Yeah screw this, the author has some serious issues man. The only things I can think of that would warrant this level of revenge are so illegal she would be in jail before he could get his revenge, so this HAS to be some sort of revenge porn or something.
I tried to give this manga the benefit of the doubt, but it genuinely makes me sick seeing her be treated like this for literal months by everyone she's encountered so far. Let me know if it gets better, but I can't read much more of this anymore.