I do kind of hope he actually does try going back into acting. Him as full time helper is great, but it feels like we need to see him in a position where the other 3 are supporting him achieve stuff, like he supports them.

So heads up.
MC is likable enough, but a lot of the side characters are kind of garbage and the series gives a LOT of attention to them. It's not even the usual "mc reincarnated into someone who was scummy" thing. It's just that the love interest is a thot who thought of him as lesser, and started chasing after someone else.
Fortunately, MC isn't a simp which alleviates a lot of issues for now, but it's very much a "one step away from being good and one step away from being crap" situation, depending on how MC handles the other characters.

You might want to add more context to your spoiler warning because I was just referring to the first chapter, whereas yours is a major spoiler that even the current chapters haven't begun to hint at yet.

It's a combination of 2 popular genres, and so far it's specifically "alright". The art is great, the system behind her powers is somewhat creative despite it being 60% the standard "appraisal" invisible stats that only MC can see, and the concept is actually quite original.
The problem is that it immediately jumps into probably the worst cliches of both genres almost instantly and Unfortunately those are the only things driving the story ATM.
Those being "MC is only considered a villain because they were horribly wronged but everyone is an asshole and sides with the actual villains, immediately assumes they're lying, and therefore treats MC horribly due to their own assumptions, and it'll all probably be brushed over with not nearly enough consequences for their actions after MC just temporarily acts standoff-ish for a couple of chapters" and "MC is ridiculously OP, has more than enough reason to kill/beat up her enemies, supposedly has a history of doing specifically that in the events before the actual story and it would seemingly solve all her known issues, but they don't because that would make the story short without all the contrived BS of MC not directly dealing with the people openly trying to make her life miserable".
Honestly, if those things don't bother you, you'll probably enjoy it, I was just pretty annoyed with how things mainly went in the first 11 chapters personally. But that's just me.

So, spoiler for the first chapter, but also to give a little more context:
MC's friend(the hero) is gay and a Yandere, and secretly killed everyone that would potentially get close to MC. The hero dies, so MC gets sent back to the beginning where he plans to kill the hero and take his place. The harem is basically just all the people the hero killed in the first run.

Honestly, it's a pretty great series as of chapter 18, and I genuinely wasn't expecting to see the MC handle the situations as well as he does. On top of that, the harem aspect is more of a secondary thing of MC just being kind to characters that are already wholesome(which makes their deaths in the first run even sadder).

So, are they just not going to address that the prince also tried to murder his opponent while their back was turned after losing the dual to them?
Like yeah, MC is a commoner. But it was still a public event, and MC is pretty famous as an asset to the kingdom. On top of that, now the MC has complete justification to directly be against the royal family while again, being a a notably powerful individual that other families are already trying to bring into their own militaries.

I can't wait to see the reactions everyone on the outside has.

So, heads up.
It's an interesting premise and has promise, but it's told in a really crap way in the first 2 chapters.
What I mean is that it starts with a young MC, and MC starts telling a story to his students, and it jump cuts to MC as an old man as if it was in the past, but it's actually the future, and older MC starts thinking about something bad that happened to the students in the past, which implies that it happened after the initial part of the story which was set in the past where the students were okay, but it's actually before that part, and another character points out that he literally solved the thing he's regretting and was happy in the first part, which happened after the third part, so it literally makes no sense why he's so down.

Basically, the story will be potentially great once the author gets his shit together. Hopefully that can happen in chapter 3, so that new readers can just skip them and get a cliff note version.

Read up to 26. And yeah, It sucks.
Firstly, the description is wrong. He didn't travel into the past, he traveled to the future.
Secondly, the series works on nonexistent logic. The teachers are against rule breaking until they aren't. They're all D-bags who punch a small child for being distracted, until they aren't. MC is weak until he isn't(but don't worry. He didn't have to work for it), and his logic for not telling the people that he's the legendary figure from the past and has super crucial information on their enemies is because "It'd be a hassle, and they might not believe me."That's the savior of humanity guys. He doesn't even evolve! He just steals specific powers from the demons he kills.
And I know the other comments say it gets better, but I honestly just didn't feel any investment in the characters or the world. So I'd give this a pass personally.

I think it's because even if they couldn't have succeeded, they still officially failed miserably against kids. So if he let them go despite failing, it'd look like he was being weak by allowing excuses to justify failure, on top of these people potentially gaining resentment as a result of this incident(whether it's towards Helmut for making them fail, or towards the organization that sent them on an unreasonably difficult mission disguised as an easy one).
So getting rid of them wasn't because he didn't understand, but because he was trying to prevent any fallout from their failure.

Summary:It's like the Wish.com version of Wise man's grandchild, with a ripped off speedrun of the piggy duke premise.
Art isn't bad, but kind of bare bones in every other department.
That being said, the "rival" is just pure bad writing. Like, this child is just the most cliche brat character, but also openly commits crimes against the most important people in this world(including attempted murder) and should've logically been publicly executed twice as of chapter 13. And it's not even like the series makes it look like he gets away with it. The dude gets caught, everyone calls him an asshole, and then everyone just forgets what he did.

Worthless regression

...https://i.postimg.cc/tTZsbksL/i.jpg

So, now MC personally has the skill to nullify 99.9% of damage he takes. Right?

You dont seem to get it, so let me ask this. How much is your life worth? Let's say I rescue you from a burning building and save you, and now you owe me. What can you do to ever repay me? Saving my life is most likely never going to happen, so how would you ever repay me for what I did? Nothing you have to offer me is useful, but I literally saved your life. Sure, I may say I don't care, but literally every moment of your existence, every breath you take is a result of me going out of my way to help you. What could you possibly do to return that favor to me? What amount of money is worth your entire future?

The problem is that your version of kindness is unreasonably cruel at times.
Having an unpayable debt(especially out of charity) to someone weighs heavily on the mind and creates feelings of failure and insecurity(which DOES lead to suicide occasionally).
Whereas having a debt that you HAVE to pay back gives motivation to work hard, and get back on their feet. So it's almost like getting a second chance.
The problem is that you're looking at it very very very surface level, which kind of makes it into the "give a man to fish vs. Teach a man to fish" scenario.

Summary after the first 30 chapters;
Not bad, but also not my cup of tea. Basically, MC is constantly running into victims of power abuse and the police are constantly always 100% corrupt/bought out so MC constantly has to throw legal jargon to get everyone to stop being so evil, because corruption and power and all that stuff.
Honestly, MC is pretty good. He legitimately thinks ahead and plans using his lifetime of experience, which is a huge plus as opposed to him just magically being the best.
That being said, the story runs on Twitter logic where basically anyone the MC gets along with is good, and everyone else in the world is stupidly eeeeeeeevvvvviiiiiilllll. Like, seriously. MC will literally just walk down the street and suddenly save some random elderly person from a porcupine molester whose father is the president of the police bribery company(obviously didn't happen specifically, but you get the idea).
So while it was interesting at first, I just got tired of the same "everyone with power is corrupt!" formula over and over again. That being said, maybe you won't find it so repetitive. This is just what I felt while reading it.

It wasn't until reading your comment that I realized he wasn't saying "God d%mn" in a funny way, and instead quoting some internet trendhttps://i.postimg.cc/FsVwTzw7/i.gif

Never thought I'd see Yoko Taro making a cameo herehttps://i.postimg.cc/Vk0fRLrQ/i.jpghttps://i.postimg.cc/pLmT6JSS/i.jpg

MC probably SHOULD break up with the girl if all their relationship amounted to was just 1 canceled trip. Especially when she knows him being busy= him saving lives