Santa it doesn't even have to be as complicated as all that, what a lot of people do is to start off with the emotional abuse, dropping hints that your calves have got bigger, or your gravy too hot, too cold, picking on the small stuff. So you might cook a dinner but get it criticise for one small "error".
You don't feel good but you let it pass it's small stuff, the insults get a little more personal, advising you to use blotch cover or how your skirt is too tight, calves getting fatter, etc. Then the anti gets up and you end up with what is happening to the OP. I've been there.
They rarely start straight in with the abuse or we'd be off at the start, but they wait until they think they've got you where they want you, married, living together, pregnant and they start, chipping away. What then happens is that your confidence and self-esteem gets chipped away, you double question yourself, is it me or is it them? Self doubt creeps in.
Then of course they are sorry, they love you they hug you and do everything that you want them to do, but it starts again and intensifies.
It's known on the net for googling purposes as the cycle of abuse, I've been in the middle of it but couldn't see it from the inside. It was only when I left and researched this stuff, I could personally tick every box on it.
I'm not saying it is the explanation but it is a very common one. Even the strongest of us with the greatest childhoods, good careers etc can get sucked in. 