In other words you hate humanity because that is honestly the behaviour of a normal person....

Why would there be a katana forge in the business district 😭

It's someone he knows, not a stranger.

He knows her though

Likely because the author is trying to portray this story as something more grounded in reality and realistic. If someone faced their deaths only to be reincarnated on familiar surroundings, it is likely that they'd attribute it to a dream, almost as a cope mechanism. The only reason as to why stories nowadays forgo this and go straight to the action is either because the story they're trying to tell isn't trying to be grounded in reality, or because they expect their audience to know it already, and that they do not want to read the "prologue" again.
The same applies to his personality, while you see a lot of people brag as they imagine themselves to be the first ones to rise to the occasions on situations such as these, history tells us otherwise, they get scared, even when they don't want to be, it is the reason why we remember the people that do, as there are a ton of people who could've but do not. It also opens the character to receive character development, as they start "just like us" and as the story progresses he becomes a "true protagonist" per say.

I'm pretty surd he got it as a Bonus for being the First Person to die to the monsters.