I'm not a combat vet, and I'm a PTSD sufferer, female. So basically, I have no business in this thread, but I do have an analysis that might help.
He is painting himself into a corner and I swear it's like self-sabotage.
Close, I think. Everything you describe sounds like classic cry-for-help behavior. He is unable to ask for help, for whatever reason (and I would expect the military psychology comes into this, along with assumptions about what it means to be a man) - so, because he can't ask, he is creating situations where help will be forced on him; or, something will break and change and maybe that will give him relief. It's not consciously manipulative - it's a bit like how a drowning person becomes incredibly dangerous to rescue, because they will most likely not accept that the danger is passed, and can drown the person helping them.
@Sighs said, amygdala hijack - and that's a big part of it, specifically for PTSD. However, this kind of behavior happens to people who suffer from all kinds of mental illnesses. They are at the extreme end of having a brain that is malfunctioning, there is something that inhibits their ability to go limp and ask for help, so instead they flail and flail until something happens.
Because he's untreated, he's got no skills to apply to help himself. That's where the self medicating comes in, with alcohol. The rage is a way of releasing a lot of pent up shit. And you are the target because on some level he knows you are the one who will force the change. But, since it's spilled over into the workplace, he's just as likely to flail in public now, which could result in any number of things that probably wouldn't actually help him get help. Getting into a bar fight (for example) will just get him fined, and feeling worse.
He needs mental health intervention, and I'd say, he needs it now.
So if you truly love him, then you have to look at what made him the way he is. You have to get into his past with him an see what made him have his PTSD.
Nope. This is what a treatment team does.
@PTSD-GF is his partner, not his therapist, not his psychiatrist, not his doctor - and she's not
him.
He needs to be willing to look at where his illness comes from.
He needs to get into his past, with a trained clinician, and break apart that PTSD. What
@PTSD-GF can do, maybe, is help him see that it's time to see a doctor. It's time to work on this.
Hopefully, he will be willing to listen and try. I don't know any good ideas for how to pull that one off. I know from doing intervention with mentally ill members of my family that underneath all that lashing out is a whole lot of terror. It's a horrible thing, to not have control of your mind, and to have it affect your actions. It feels like shit, too. But whether someone is ready to just break and admit they have a big problem...I don't know how to know.
@PTSD-GF - the other thing you need to do is think about how to take care of yourself. Try and not be the bargaining chip - "I'll leave you if you don't get help" works sometimes, I think, but definitely not always - and even when it works, it can come back and bite you in the ass.
Can you try and talk straight with him?