Hi
Sounds like he is shifting the blame, accusing you for what ever, so he does not have to take responsibility for his own action.
As for you changing to suit him, put it to him that meeting in the middle ground is a better option.
Only you can decide whether you can keep going like this, but no one here will accuse you of anything if you do. Not many put up with this treatment for too long, before they break and call it quits.
Oh and before anyone tells you it is all about him and you should respect his needs, tell them it is a 2 way street, and so far he is treating it as "One way only".
We can care and love the people they truly are, but when they let PTSD rule their lives and use it as an excuse for everything, then they are way out of order. This is the part we do not love, and if this is all you see for the most part, then listen to your head not your heart, see what answers you get then.
Take care of you first.
Amethist