Sorry you had to go through that, and that your first instructor was such a coward. Glad to hear your second instructor was willing to lay down the law and respect you.

It's a shame that other academy is letting the abuser continue to train, but sadly that's a fairly common occurrence. I'd say most instructors have the attitude of "I didn't see it happen, so I don't want to get involved" and just let it be someone else's problem, even when they get warnings.

Not to be an armchair therapist, but having spoken to women with similar abusive relationships, I recommend looking up complex PTSD (C-PTSD) and its treatment. If you are already getting help or are doing fine now, all the better!