I read fanfics 24/7. I'm currently reading a Scooby Doo/Justice League crossover fic where Shaggy gets a yellow lantern ring that feeds off of his own fear. One of my favorite fanfics of all time is a SoL FNAF one where they're all anthros living in an apartment together. I could list every single abbreviation for every single Harry Potter fanfic trope off the top of my head. A self-insert South Park fanfic isn't even a drop in the bucket of terrible shit I've seen.