Fanfictions based on where they're posted:

Wattpad: Terrible grammar, poorly written, really confusing

Archive Of Our Own // AO3: K i n k y af

Fanfiction.net: Either a crappy novel or a great oneshot there's no in between

Quotev: Even worse than Wattpad

-
A/N: As someone who's reads fanfics like it's oxygen I can assure you that the A03 one is 100% accurate