https://i.postimg.cc/bJsnNx0F/i.jpg
Here I thought she was going to confront her true feelings. these women are wild.

Diana Is a Strange Mermaid

https://i.postimg.cc/nznPMy8d/i.jpg what I'm guessing the writer will say

Kill the dad.

Honestly, I kind of get his first life just switching sides and killing them all.
Dude was a spoiled brat growing up, but he was also raised without a mother and treated horribly by EVERYONE of similar or higher status, ESPECIALLY by his family(who care about him but range from psychotic, to psychotic and sadistic) and his father was just garbage.
Not saying he can't do better with the powers of hindsight, but I can't blame him becoming desensitized and cruel, given what we know now.

Dude, you picked a fight with a majority of the top dogs in the entire demon world based on the orders of a newly appointed dude that's got no real power.
Iruma isn't an enemy to the border patrol. You're just a complete dumbass who picked a fight by trying to abuse your position with someone who drastically outranks you.

That's actually an insanely good concept.
MC is just using knowledge and dropped exp from his old playthroughs, but to the people of that world(who lack the knowledge that they're in a video game) MC appears as an infinitely reincarnating hero with countless past lives.

The king is the luckiest SOB of all time.
Dude actively kicked the hornets nest his whole life and made so many mind numbingly stupid decisions that should've 100% destroyed his kingdom, yet instead he got rewarded with basically everything going as perfectly for him as it possibly could.

https://i.postimg.cc/nVWdvwDd/i.gif

The nicest way I can describe it is a heaping pile of shit.
It started off decently enough, but MC rolled over so hard and so fast that(as of chapter 12) he's even more pathetic than his pathetic "former self". It's honestly just too painful to continue reading at this point.

Yeah, they really made it so neither of them deserve to be with MC anymore.
MC isn't the nicest guy, but he still deserves way better than the crap treatment he's been getting for the last couple arcs

Pretty sure you're just trying to deflect multiple people pointing out something you're very clearly wrong about with the excuse of it being set in a different time period when the actual series never supports that idea of it being the standard, nor does even history, really.

The evidence is that when we first see her, she's critically injured and a total newb to the point where she was 1000% going to die and/or worse if MC didn't patch her up and take care of her from the gang she pissed off, but with the MC, she gains essences and the ability to communicate with spirits and fight better(which she couldn't really do before) while now she's just isolated in her room having a mental breakdown.
And while, sure. You could argue that she's getting better at controlling spirits, her psychological state has been shattered, and a fragile mental state is way more dangerous than anything else when surviving. So her sister is essentially crippling her on top of torturing her. And I'd call that the opposite of helping her get stronger.

No, the least he could do would be talk to his father or the doctor standing at his side about it. Not immediately start assaulting the person because you think that a child is committing the crime of being slightly immature. You can try to justify it, but that doesn't actually make it justified.

Wow, that elf sister is just a total POS.
Yeah, traumatize your sister and let her dark feelings fester while she thinks the guy she loves is dead because "you think she'll get stronger as a result" while also refusing to acknowledge that that guy made her 10000x stronger in the few months they knew each other than the literal years she spent being trained by you.
Honestly, I hope the elf finds out that her sister has been lying to her all this time. It'd make for a far more interesting drama then just having her become a yandere.

Nobility and royalty.

Dude openly started cheating on his wife and repeatedly publicly humiliated her to justify his affair just because he wrongly assumed she wasn't able to have kids. Then tried to kidnap and kill her family out of spite for her leaving instead of staying as a disgraced noble that he could call on at his convenience.
Sure, the dude's regretting it and realizing how badly he screwed up, but the dude still made his bed and now has to lay in it.

It's like a bad AI wrote most of it.
It's not even that it was stupid, it's just badly written and more phoned-in than a telephone operator. I've seen more inspired mud than this.

Dude. Just. Get. The. Police. Involved.
He have witnesses and it's not like he has a reason to not let her get arrested

Yup. If anything, her leaving that girl alive and JUST crippling her was the merciful outcome.