
Its not because of how they're a girl or how they react, for me its because of how they are written.
She's a hs school who has never experienced having a crush before in her entire life so to me it's pretty simple to understand her pov of the situation, but since we're in MC's pov we can clearly see that he genuinely doesn't like her. But she can't see that.
She's blind by the notion of having a crush for the first time in her life.
So yeah she's annoying but can you blame her for trying? She doesn't know what's gonna happen like the mc does, so to some people, she's annoying.

Nah I mean... even a blind rat can see he's not interested... her pestering him is annoying... and her personality is annoying too. Purple hair is less annoying in personality but still annoying how she's background checking him over her own curiosity, understandable but still annoying. Rachel... idk... she believed he likes her over a rumor even tho he doesn't... and all that shy shy shy hesitant personality is annoying too... I can't even bring myself to like Evangel cuz she looks just like her... btw I also dislike that name... either Eva or Angel would be better Evangel is just... weird...
Honestly the 3 girls combo makes it even more annoying because it gives that in your face feeling... and they even bicker among themselves... he have 0 chemistry with the black haired leader but I ship them because the others are too annoying...

The name bit is funny cuz he did name these characters so u can get the idea that he has horrible naming skills when it comes to the foreigner characters on the everything else, understandable. We've seen the same type of cliches on each mangas/manwhas over and over that it's easy to hate them for being like that
Hahahahahhah now everyone understands the pain of annoying female characters