IDK man... the story does not make much sense to me. She seems like a thundere, but the worst kind as she is an actual bih. The dude is perfect but no one noticed because of her. And the author keeps teasing the obvious by showing her obsessed over him, but they can't decide whether we empathize or hate her.
Apart from her, the dude is just a normal romcom protag and follows a cookie cutter school story, which makes him even more dull as he can't do no wrong.
The only "enjoyment" you can get from this manga so far is looking at the dude thriving after getting out of a toxic relationship. The author just seems not brave enough to do something interesting with the characters and situation.