If no-one likes this Flash, then he's just an annoying troll. Why should Peter even care what he thinks or what he says online if Flash doesn't have the backing of others to influence them? Why would others even believe what he says?
Even if Flash weren't a physical bully and jock, he was still the most popular kid in the class or school and girls wanted to be with him. He also had social influence and his words carried weight with others.
Revelori's Flash seems like the least popular kid in the school. How can this Flash even realistically bully Peter even psychologically if no-one is supporting him? There's an old proverb which says "He who thinks he is leading when no-one is following is only taking a walk". That's exactly what it's like with Revelori's Flash. Who is actually following him when no-one seems to like him? He's walking alone. At least comic Flash had followers.
Even Peter seems more popular than him. In fact, compared to any of the other kids at this school and how nerdy they look, Peter looks like the coolest and most traditionally Flash like. He should be the one getting all the girls.
When Peter looks like the coolest kid in a school full of nerds, then there's something wrong with that.
This Flash is just a pest, not a major influencer of others. He's like the kid no-one liked whom everyone beat up - even the girls.