I can't say I have the PTSD in common with you, man, but I feel you on the high self-expectations. Back when I was 7 or 11 (I can't remember if it was 2nd or 5th grade) or so when explaining a poor test score to my dad I told him "I did my best" and the response I got back was "that's not good enough." That's stuck with me for the following 20+ years. No idea how much of a role that plays but it's probably non-negligible. Hit me up if that stuff is fucking you up or w/e dude.