I don't think anyone is displaying misogyny; we JUST DON'T LIKE HER; in fact, I'd rather the girl with the black hair be the MC's love interest if this is supposed to be romance even though there are no tags for that.
Just because someone dislikes brown hair does not imply that everyone dislikes female characters, so stop believing you know what everyone is thinking. Keep your own ideas about people in your mind.
I'm a girl, and I don't appreciate it when people presume that people dislike female characters because they are female.
HER CHARACTER TRAITS JUST SUCK.