He is not any better than those smooth brains either. He is constantly simping for a girl who CLEARLY has no interest in him (and maybe in his entire gender for that matter), constantly berate and insults him and practicely tells him to fuck off. It is unwanted attention. He tells her the kiss in this chapter for some retarded reason lol.
I know we love to hate Miya but don't forget, she is constantly on screen because of the MCs fucking obsession which so far, has absolutely no logical basis. She is pretty adamant about who she likes as well so she pretty much has no fault.
We don't need to learn why she doesn't like him. We need to learn why the fuck he does. And to this degree.
If anyone is dragging the story, its the MC first and foremost. He should be the target of all this frustration instead of his target.
As much as people want to hate Miya, the fact is that more and more we see her attitude is justified.
Seriously, all you people who hate her, assuming you're a straight guy, imagine this, you have a gay male friend who constantly is looking at you, clearly in love with you, and think he has a chance even though you're 100% straight, always pinning for you no matter how much you make clear it won't happen ever, but he never takes the hint and is always trying to win your affection again and again.
That is basically Miya situation in a nutshell.
Is her attitude shitty? Yeah, can't deny that, but it is perfectly understandable, because the MC is the one in the wrong here.