I empathise with your confusion and difficulty in articulating the abuse.
This probably sounds terrible to those not having been through it, but I was actually kind of glad that my dearest darling husband (heavy sarcasm there!) hit me in the end.
It clarified my mind perfectly, after the concussion wore off of course (ok, I'll hold back the gallows humour now!).
But hideously had jokes aside, i was so mired in the abuse I couldn't see what was going on or how to understand any of it. I just knew it was awful ... I believed his blame and actually thought I was the bad one. I thought I was 'mental' and 'had an anger problem'. I even thought I was the abusive one.
He really did a number on me. Just like yours did.
Mumsnet helped alot. And the thump to the neck. I knew what to do about such outright physical abuse. And I knew in my hearts of hearts that I couldnt have caused him to do that. Looking back, there was other physical abuse, but I was so lost and reality so confused, I couldn't see it for what it was.
It's just unutterably sad that it took that to make me realise that not only should I get out, that I could get out without anyone blaming me for it all.
The thing is, i was angry and mean in arguments. I wasn't nice to be around, for stbxh at least. But I've now realised that it's perfectly normal and acceptable to have negative reactions to negative stuff happening. That was actually the most healthy thing I was doing actually! And that probably goes for you too?!
What wasn't healthy was staying and believing I deserved it and just needed to try harder and it would all be fine... and that's what I need to work on still, boundaries and knowing it's ok to walk away.
I hope you can find your way straight to that same end point, it sounds like you're really there already 