Why to drop fanfiction story immediately

pink-pipes asked on Reddit

What Tropes or Scenes Have Made You Drop a Fic Immediately?

I have prepared this list:

harem, Ménage à trois, polygamy, fluid sexuality, PWP
adult/child + Death Eater/normal romantic relationships (yes, I am certain there are some exceptions, but I have yet to find truly good Drarry, Draminoe, Snarry ... ewww, Snamione ... ewww, not even mentioning anybody/Voldemort, anybody/Bellatrix, anybody/Lucius)
dark!Harry (or dark!Hermione etc.)
pureblood culture & pureblood Hermione (I tried few, none of those were completely horrible, but I don't feel the need to seek for more)
OP!Harry
almost all crossovers (especially with superheroes, Star Wars)

However, since then I have noticed couple more of these:

Dramione stories … “I bullied you, because I loved you.” It is not cure of a problem with young Hitlerjugend, it is disgusting. Just say no.
sheeple
A time travel story: “Good, then you understand that Sirius needs to stay in Azkaban until the time is right.” No, I don’t.
Apartment-sized trunk