Oh my God, that is just pathetic. I can empathize with John on some level because I understand that having a bad childhood affects you in a major way as an adult. However, I get this unpleasant self-pitying vibe from him where he seems like he uses the bad things that have happened to him as an excuse to act like a malignant asshole to people for no reason (a la, R. Kelly in that "I Admit' song). It reminds me of those dudes on Reddit who rep the "blackpill," where they're horribly rude and they wallow in their own misery like lukewarm bathwater with the excuse that the (admittedly valid) hardships they've faced are reason enough to never adjust their behavior.
It's bad that John K dealt with that shit growing up, but it doesn't give him a free pass to scream obscenities at his co-workers, push people down stairs, and act like a pervert towards his young, impressionable interns. That level of constant, all-consuming self-pity is just narcissism presented as having depth.