Hi msphilip,
I am sorry to hear that you have had such a rough experience with your ex partner and his PTSD. Does he even acknowledge that he has PTSD and if so was he getting any treatment for that? I am not surprised that he only had 'episodes' at certain times, this is not unusual for those with PTSD. Although it is with them all of the time, it impacts sometimes more than other than others.......usually when the stress levels just reach too much. As for the rest of his behaviour that is PTSD in denial. He would blame everything on you because otherwise it was would have been necessary for him to face his own demons. Sounds like you were trying to help him but as you identified in a lot of ways you were enabling him to continue his denial. Just something that a lot of us do, unwittingly, until we learn better or get sick of the crap - whichever comes first.
As for you not faring so well, there is a thing called secondary PTSD which can be acquired from being the support person of someone with PTSD. Although that is at the extreme end of the scale it still impacts deeply on an emotional and psychological level. Have you thought about counselling for yourself to relieve some of your burden and to put some of it in perspective? A good counsellor who is familiar with PTSD would be the best as they will understand everything that you have to say. I have found that counsellors with little understanding of PTSD usually are not much help. Please don't beat yourself up because you cannot continue to support him. Perhaps this is the wake up call that he needs to get help and then on the other hand perhaps it will do nothing. You have to take care of you first. Just because he has PTSD, which is undeniably a nasty and debilitating mental illness, does not excuse his crappy behaviour. You have to draw the line about what you will and won't accept and make it clear to him. Sure he has PTSD, sure you care about him but he is an adult and responsible for his own actions. Those with PTSD (and I am sure it is not exclusive to them), in fact most human beings, would rather blame someone else for their behaviour when they are in denial. Doesn't make him nasty, just makes him human but still responsible.
Hope this helps. I have been living with PTSD for almost six years, three of that we have been married. Although it is really tough sometimes and I really think I deserve more support than I actually get, hence the first post in this thread, I do love him and continue in this journey in the hope that it will be better for us - together and as a family.