Please get help in having a more positive lookout to life. Be it therapy, a new and (hopefully) fulfilling hobby, philosophy, anything. And, on the other side of the same problem: try getting rid of habits that make you unhappy. Otherwise you are going to spiral downward.

So the goal is creating a completely destroyed human being. No resocialisation or anything?

Ah, hidden in the sharing options. Thank you!

Not fiction, but holy fuck, it was eye opening: Humankind, by Rutger Bregman.