The fact that her ex is actually a good guy makes it worst :(

that’s what i thought too.... the worst good guy out there

I mean is he such a good guy that he started cheating on her and as soon as she left he started bringing the other women to “their” apt....

obviously not but the author did show he was a genuinely good guy in the beginning so that’s what makes the whole situation that much worse. that someone who’s supposedly very sincere could actually be a terrible person