He might also get angry. Peter has a strong sense of justice. If he feels that the Avengers are being unfair, he could stand up to them. He'll use his quick wit and his powers to show that he's not going to be pushed around easily.
I'm not entirely sure what 'ex' means in this context. If 'ex' is short for 'experience', it could mean that Peter has some sort of experience within Avengers fanfiction. Maybe he's a character in a fan - written story and has had certain adventures or relationships within that fictional universe.
In fanfiction about Peter, the Avengers are often central to his story. They can act as his safety net, always there to catch him when he falls. Their presence in his life can change the way he views himself and his role as a hero. He may feel pressured to live up to their standards, or he could be motivated by their trust in him. Moreover, the relationships he forms with individual Avengers members, like his friendship with Ned which might be influenced by the Avengers' team spirit, are important aspects explored in such fanfictions.
One possible reason could be a misunderstanding. Maybe Peter accidentally gets involved in something that looks bad to the Avengers, like being in the wrong place at the wrong time during a security breach. So they misjudge him and are mean as a result.
Peter is likely to be in awe. He might be a bit nervous at first, but also extremely excited. He has looked up to the Avengers for a long time, so meeting them would be like a dream come true. He would probably be stuttering a bit as he tries to introduce himself and show his respect.
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.
Well, in this fanfiction, Peter Parker might meet the Avengers in a more casual setting. For example, he could be at a science expo where some of the Avengers are also present. Peter is there to show off his latest web - shooter design. The Avengers notice his intelligence and his unique abilities as Spider - Man. They then start a conversation with him, and from there, a relationship between Peter and the Avengers begins to form. This could lead to Peter getting involved in more Avengers - level missions and growing as a hero.
Well, in many fanfictions, the Avengers protect Peter by always having his back in battles. For example, Captain America might shield him from incoming attacks with his iconic shield. They also offer him guidance. Tony Stark could be constantly giving him advice on how to improve his suit and combat skills.
Tony Stark might use his quick wit and technology. He could immediately scan Peter to make sure there's no physical danger causing the hyperventilation. Then he'd probably crack a joke to try and calm Peter down, like 'Kid, you breathe any faster and you'll fly away like a human jetpack.'
Peter would likely feel betrayed. He looks up to the Avengers, and for them to hurt him would shatter his trust. He might start to question his own judgment in idolizing them and could become more withdrawn.