I cannot stand it when fanfic authors spend the first three chapters setting up a strong character and then the rest of the fic having him/her be whiny little bitches who can’t seem to stand up for themselves or let people walk all over them.
I cannot understand why 99% of fanfic authors feel that everyone must be forgiven in the end. Weasleys and HG are bashed throughout the fic, but are forgiven in the end, despite their huge ass sins against their friend; Scott has almost gotten Stiles killed again, Stiles stops talking to him…but somehow forgives him within one chapter. Etc., etc.
I hate it when an author portrays a character being gay as a choice instead of it just being part of who they are.