Let's say you are reading a fanfic. It starts more or less nicely, and has some things that you say "Hey, this might be interesting".
And suddenly something happend, let it be shipping, fakémon or the extreme use of Legendaries. Maybe the author killed some character you love for no reason?
In short, what things do you hate on stories or fics?
The thing I can't really stand about Pokémon fics is, for example, the humanization of all Pokémon. While I do accept Pokémon having feelings, and being intelligent and capable of comunication between them, I don't like fics that are based on a shipping, for example, between two Pokémon. Might be because
I haven't played the Mystery Dungeons games, in which apparently Pokémon are just like people, but it just isn't my pice of cake.