I'm looking for a Novel where the MC is just like a simple minded child but along the way of his journey as he sees the dark side of the world he got broken in some tragic experience but he has no one to turn to so he becomes a psychopath and a maniac and he throws away his morality in this kind of shtty world.
Pure Love x Insult Complex Broken from start tho, but healing along the story Similar yet different than what you want, just try it MC goes deeper into the behind the scene world