This kind of abuse is a bit like an optical illusion - one minute you see it as clear as day, the next you don't, even when you search for it you just can't see it.
I was in an horrifically abusive marriage and even I sometimes wonder if it was that bad, if there isn't some explanation, some way to normalise it and make it plausible, palatable.
I think you will forever wonder if it is what it so very clearly is. This will lessen once you get away - you have to flatten them out, make them the 2D baddie in order to move forward, else you will always second guess yourself.
My abuser died horribly in an accident, which ups my tolerance for him and what he did. I find myself musing about this and that : how young I was/busy with life, career/how young he was blah blah. I am a naturally compassionate sort and I can wring my hands and feel sorrow that I/we didn't try harder..
Then the optical illusion comes into focus and I remember I had no hope at all against his abuse, that I was the only one who was trying, slogging my guts out to try to make it work, while he did nothing but up the abuse - and justify it!
My, our, problem is we humanise our abusers too much. They aren't like us is the bottom line.