Well, I just finished university and I can't say I'm any more mature than in high school. XD Really, people don't change with a snap of fingers just because they go to university. And it kinda was about the fact that things repeated itself... that was kinda the main point... (⌒▽⌒)
I'm also about to finish university, but I don't know anyone who actually still behaves likes that and bullies other people. and one of my class mates was actually in a wheel chair, but people were respectful towards him. That's why I find it hard to identify with the characters later in the manga.. also, I can still be immature and childish sometimes, but more because I try to cheer up others, not because I am insecure and want to bully..
Regarding the repetitiveness, I understand that the purpose was to show how difficult it can be to stand out from others, but not when the story does not reach the same depth as it did the first time..
it would have been better, for example, to completely leave out some of the annoying side characters and to go deeper with the actual plot, or to make the side characters' stories into the main stories.. Like one volume where the blonde girl is the main character, the second volume where the blond guy etc. Rather than just giving them one chapter each where we get to hear about their problems..
I liked the manga until they started at the university, where the characters still remain too immature for their age. it became unrealistic at that point, like they were all still in high school or something.. also the author just uses the same technique to keep the story going, so the plot became very predictive and repetitive at the end..