Take out the alcohol, and holy crap, 1 through 4 sound familiar (both the 4s...). My sufferer is a combat vet also, but I never attributed any of his behavior to that (it sounds like the Navy was the best thing that happened to mine at the time); however, he was a correctional sergeant, so...did have the snap decisions, life on the line job in that.
I have an English degree, and boy howdy does that get mocked, along with hearing "Now I may just be a dumb prison guard but..." and I have NEVER called him stupid or talked down to him for not having a degree. To the contrary, he's incredibly intelligent, and I have told him that's one of the things that makes him attractive to me.
Any standing up for myself in his tirades was met with "If you don't like it, leave, this is how I am." "I need to be alone, I can't deal with you or anyone else," is coming now, after 7+ years of living together.
He's also untreated, and the only skills he has are those he taught himself, and a few he's had from an anger management class he took in his work, and a brief stint dealing with the PTSD his work caused (which is, ironically, not our current problem - it's complex-PTSD that is the main issue that's splitting us up).
I hadn't read this thread previously because I didn't think it "applied," since I don't think of my sufferer as having combat-related PTSD. But, maybe his time in the corrections field is about the same thing.
Ah to be able to turn back time and know then what I know now...