Perhaps he's been injured in a fight but tries to hide it and keep going. He's a very determined character. So, he might push himself until his body can't take it anymore and he collapses. Also, there could be some sort of mental stress factor. If he has a lot on his mind, like the safety of his loved ones or the weight of his responsibilities as Spider - Man in the Avengers, it could take a toll on him physically and lead to a collapse.
One possible reason could be overexertion. Peter Parker is often in high - stress situations in the Avengers. If he uses his powers too much, like constantly swinging around the city or fighting powerful enemies without proper rest, his body might give out and he could collapse. Another reason might be some sort of poisoning. Maybe he gets exposed to a new kind of chemical or toxin during a mission that affects his superhuman physiology.
One possible reason is that Peter's quick rise to popularity among the public might make the Avengers jealous. They've been around for a long time, and suddenly this young kid is getting all the attention.
Maybe it's due to a new and powerful enemy's attack. In fanfiction, authors might create unique villains with abilities that specifically target Peter's weaknesses. For example, if the villain has the power to disrupt Spider - Man's enhanced senses, it could cause Peter to be disoriented and ultimately collapse. Another aspect could be that Peter overuses his powers without proper rest, which exhausts his body and causes him to collapse.
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.
One example could be the Avengers accidentally revealing Peter's secret crush during a team meeting. Maybe they were sharing stories and someone let it slip that Peter has a huge crush on a girl in his class. Another instance might be when they tease him about his old, dorky homemade Spider - Man suit in front of other superheroes. It could also be that they play a prank on him during a mission, like making him think he's lost his powers for a moment, which causes him to panic and look a bit silly in front of everyone.
The other Avengers would likely be very concerned. They might immediately stop whatever they are doing to tend to him. For example, Tony Stark could use his technology to try and figure out what's wrong with Peter. Captain America would probably be the one to keep everyone calm and organized while they figure out a plan to help Peter.
One possible reason could be overexertion. Peter Parker is often depicted as taking on a lot of responsibilities both as Spider - Man and as an Avenger. He might be pushing himself too hard in a fight or during a mission, leading to a collapse. Another reason could be some sort of external attack that affects his physical or mental state, like a new type of villain's weapon that drains his energy.
A common theme is the clash between Peter's normal life and his superhero life. He has to keep his identity secret from his school friends while also dealing with the high - stakes world of the Avengers. Adaptation is also a theme. Peter has to adapt to the Avengers' way of doing things, which is often very different from his solo operations as Spider - Man. Another theme can be sacrifice, where Peter might have to sacrifice his personal time or safety for the greater good of the Avengers and the world.
Another theme could be his friendship with other young Avengers or heroes. His relationship with characters like Shuri could lead to interesting stories about sharing knowledge and collaborating on new inventions or strategies for saving the world.
He might think it's not in line with the real Steve. Fanfiction can be quite far - fetched sometimes.
Well, it might be an exploration of the psychological toll of being a superhero. Peter Parker constantly faces danger, loss, and has to keep his identity a secret. Writers may create 'suicidal peter parker fanfiction' to show how all these factors could potentially break him. Also, in the context of fanfiction, it could be a way to subvert the typical heroic narrative and show a more vulnerable and broken side of the character. However, it's a very heavy and potentially triggering topic.