I'll start: Have you read the comic about a troubled teen reeducation camp?
https://elan.school/ The staff tortured kids by forcing them to abuse each other emotionally, physically, through sleep and food deprivation and monitoring/manipulating all outside contact.
I read it this week and parts of it were really intriguing and then other parts of it dragged to no end. It's long and the author's self-portrayal weirded me out at times, but overall it was interesting.
Please post more reading material from people who attended weird institutions or were initiated into some sort of brainwashing environment.