In some 'peter doesn't turn to dust fanfiction', the plot might revolve around a character coming to Peter's rescue at the last moment. This could be a character with unique powers or knowledge. They could use their abilities to reverse the process that would make Peter turn to dust. Or perhaps there's a magical or technological device that is introduced in the story that stops Peter from turning to dust. The fanfiction could then explore how Peter and the other characters deal with this new situation and what new challenges or opportunities it presents.
One place to look for such fanfiction could be Archive of Our Own (AO3). There are often unique takes on characters' fates in fan-created stories there.
Maybe Peter doesn't like the way Steve is portrayed in fanfiction. Some fanfictions might deviate too much from the original character, and Peter prefers the official version of Steve.
Peter might not be a fan of the genre of fanfiction in general. He could prefer original works and find fanfiction, especially about Steve, to be unoriginal or too derivative. Also, it could be that he has had some bad experiences reading poorly - written Steve fanfiction in the past that has put him off completely.
If Anakin doesn't turn in fanfiction, the galaxy would be a much different place. The Empire may never rise. There would be no Darth Vader to strike fear into the hearts of the Rebels. The Clone Wars might end in a more peaceful and just resolution, with Anakin playing a key role in brokering a lasting peace between the Republic and the Separatists.
Maybe Peter Parker has his own distinct view of Steve. He might feel that fanfiction often distorts Steve's real character or the relationships in the original story, so he doesn't like it.
I recommend "Villain Boss Transformation Plan", a sci-fi space-time travel novel. It tells the story of a system that traveled through the universe and finally bound a perfect host that met all the indicators, but this little sister did not match the data it scanned. The female lead was strong and had a cheat code. She had an exciting plot and some yay elements. I hope you like this fairy's recommendation. Muah ~😗
Peter is obviously one of the main characters since the story is centered around him turning to dust. His friends could also be main characters as they are likely to be involved in the events that follow his transformation.