I'm not sure of a specific 'Peter Parker is evil' fanfiction off the top of my head. But you could try searching on fanfiction websites like Archive of Our Own. There might be some works there that explore this dark concept of Peter Parker.
A plotline could involve Peter having a major falling out with his loved ones. For example, if he feels betrayed by his friends or Aunt May, he could turn evil. He might then use his knowledge of the superhero community to target other heroes and villains alike, causing chaos in the city. Another idea is that an outside force, like an alien symbiote or a powerful magic, could influence his mind and make him evil, leading to a series of events where he tries to reshape the world according to his now - twisted views.
In some fanfictions, Peter Parker's asthma can add an interesting layer to his character. It could be used to show his vulnerability even with his superpowers. For example, during intense battles or moments of high stress, his asthma might act up, making the situation more challenging for him. Writers might use this to create more drama and tension in the story.
Peter Parker is alive in the comics. Comics often have complex and evolving storylines, and while he's alive now, there's no guarantee he'll always stay that way. It all depends on the creative directions the comic publishers and writers take.
Yes, Peter Parker was indeed a photographer in the comics. He often used his photography skills to support himself and document his adventures as Spider-Man.
Definitely. Peter Parker was shown as a nerd with his love for science and his awkward social interactions in the comics. His nerdy traits were part of what made him relatable to many readers.