I feel like this is a five second conversation with that one bitchy friend who she honestly shouldn't be friends with. Actually she shouldn't be friends with any of those girls. The other girls are just such background characters and doing whatever the one annoying one says. And I don't know if the author realizes, but the said bitchy friend is clearly projecting her own issues and insecurities and taking it out of others and that's getting annoying. You're not beholden to explain why you're doing stuff outside of a friend group. Especially when they can see what you're doing on display and even the results of what you're doing (like there was phsycisl acknowledgment that the grades were better and yet part of the argument was not attending Karaoke instead of studying??).
This is just dumb. Like, not in a good one. And supposedly in the original timeline they broke ties just from having seen a light novel fall out of her bookbag and it was so bad she stopped going to school all together... WTF?? What is this author even trying to say. These are terrible people yet the story keeps trying to pretend they're being completely reasonable. Like the MC comes off as an idiot and apologizer when he thinks "yeah, the innocent one is partly to blame for not giving her friends a reason why she wanted to join a committee to help make our school festival the best it can be and (I guess) not asking for permission to study with the smartest people in class to prevent failing."