MAT said:
"As a high school teacher, the biggest bullies on campus are smaller, weaker, and generally dumber. I know, it sounds like the things parents have to say, but the bullying comes in the form of insecurity. Flash using his influence as a DJ to call Peter out makes perfect sense."
As a fellow high school teacher of AP Computer Science nerds, there is definitely a different kind of bully that exists in this environment today. They make "friends" with more physically threating jock types by providing "help" with assignments and "test preparation". While they may not be the smartest of the nerds, they are smart enough to help the jocks and more willing to cheat or steal than their smarter nerd counterparts. They are social media savvy and use this to bully the nerdier nerds and are protected from any retaliation by their jock friends, when needed, and their followers on social media to apply social pressure.
So I think they did a good job in modelling the new social order in the nerd world. But was it necessary, probably not. More of an attempt to be conscience of the changing world we live in.
If they would have had Flash do two (maybe one) of the things you mentioned in addition to the DJ thing, it wouldn't be such an issue for me and probably others. As it's been said, he was not a convincing bully whether it be a "new" or "traditional" one.