Responses
in many, most perhaps all cases the person who's been mistreating the other and falls in love may still do toxic stuff a lot, such as being controlling and manipulative. In real life toxic partners are really to be avoided, and if they themselves went to better themselves they need at the very least to see mental health professionals.

I wonder if it's really a thing where once you fall in love with a person you were mistreating, you have regrets about the mistreatment. What if you never fell in love instead?