One way is by getting involved in Peter's school life in a more official capacity. Maybe they could arrange for some anti - bullying seminars at the school. Natasha could also train Peter in stealth and evasion techniques so that he can avoid the bullies more easily. Thor could even offer to be Peter's bodyguard for a while, at least until the bullying situation is resolved.
The Avengers would be furious. Natasha would use her spy skills to find out all about the bullies without them even knowing. Thor might be a bit more direct, perhaps showing up at the school in his full Asgardian glory to scare the bullies straight. Clint could offer to teach Peter some self - defense moves so he can stand up for himself.
Well, when the Avengers find out that Peter is being bullied, it's a big deal. Bruce might use his scientific knowledge to create some sort of device that could detect when Peter is in a potentially bullying situation and alert the Avengers. Wanda could use her powers to give Peter some mental strength, like creating positive thoughts in his mind. Rhodey would be the practical one, making sure Peter has a proper support system at school. They all would come together as a family to make sure Peter feels safe and loved and not let the bullies get to him.
They might be a bit surprised at first. Maybe Tony makes some jokes about British tea and bad teeth, but in a friendly way. Steve would probably be intrigued by Peter's different cultural background and might ask him about British history.
Peter might be really nervous at first. He's used to being just the friendly neighborhood Spider - Man, and now the Avengers know he's Tony's son. He could be worried about living up to their expectations.
Iron Man, on the other hand, might be more direct. He could use his technology to track Peter's actions and confront him. He might threaten to expose Peter's identity if he doesn't stop. And Thor would probably be angry at first. He values his fans a great deal and seeing Peter bully them would make him want to use his hammer to teach Peter a lesson, but then he would also try to understand the situation.
They could react with surprise. After all, Peter is still young. But then they would likely be happy for him. Maybe they'd offer to take MJ out for a nice dinner to get to know her better.
Well, it could also happen that Peter's Spider - Man suit technology gives him away. Maybe the Avengers have some advanced tech - sensing equipment, and when Peter is around in his suit, it gives off some unique signals that the Avengers pick up on. So, they start to look into it and eventually figure out that Peter is Spider - Man.
One possible plotline could be that Peter Parker, out of jealousy perhaps. Maybe he's jealous of the Avengers' popularity and starts to bully fans who idolize them. For example, he could use his spider - abilities to play pranks on fans at Avengers - related events, like stealing their autographed memorabilia or causing minor disruptions during meet - and - greets.
Peter could rely on his own inner strength. He has a strong moral compass, so he might use that to remind himself that the Avengers' actions are wrong, not his. And then he could focus on using his Spider - Man skills to prove his innocence or protect himself.
The Avengers would react very strongly. Steve would be the first to offer moral support. He'd tell Peter that being bullied doesn't define him. Natasha would start investigating who the bullies are and their motives. And Vision, with his unique perspective, would try to help Peter see the situation from a different angle, to understand that the bullies are often the ones with insecurities. Meanwhile, Sam would be there to cheer Peter up with his friendly banter.