then the person who "can't take it" has the responsibility of communicating it. Simply existing and having issues next to someone else is not fucking abuse. Why are you using that word so lightly
I'm sorry but you saying that you were abused by someone's trust issues sounds like you expected full devotion and full trust out of your partner which does not convince me to believe you were the victim there.
You clearly haven't been in a relationship with someone who has PTSD and takes their anxiety out on you. It absolutely takes a toll on your mental health.