i have a Bunch .. this is more like. general fanfiction things that upset me rather than things about the fics themselves but

1. request books with no fics in them. i understand that maybe people just don't have the time or energy, but they always clog up the feed. if you don't have the motivation or time to complete anything, then just.. Don't take requests... 1.5 when people post fics with nothing in them to "save their tags". once again you are clogging up the feed 😭😭.. drafts are there for a reason..
2. like op said, when the entire fic is just one big paragraph. it's really difficult to focus on a giant block of text, especially if you're reading on a longer screen.
3. when the author gets bored of writing the fic & decides to end it in the least satisfying way humanly possible. i read a fic once where the author didn't want to write the pairing anymore & decided to end the fic by having one of the characters be killed by a falling meteor.????? it still baffles me to this day like you could have just marked it as complete 😭
4. seeing the author's poorly disguised fetish. Out of nowhere. In a safe for work fic. need i say more
5. poor prose.. just generally speaking.. i don't mind lowercase fics & i can sometimes even overlook poor grammar, but if the flow & rhythm of the writing is wonky then i'm probably not going to read it. there's more things i don't like but i forgop 💚