There's no point in writing an essay for 2D girl simp pretending he's got some deeper insight into average romance manga. Well, maybe you are a saint IRL who just turns the other cheek and loves everyone but I'm not. Also don't put the words "bad person" in my mouth, they weren't in my comment.
She's not amonster but she is an asshole, even ignoring the whole Aki thing, Kyou wanted to be her friend, but Shiho rejected her because judges liked her more? And now she's making up by singing for her corpse?
I wonder why did Maybe set up the story in middle school, some of Yuuko-Teiichi shots look like they're from shotacon doujin, high school would've worked better with Teiichi being slightly more assertive too.