what ruins a fanfic for you?

i’ve read so many fanfics for this fandom (and PLENTY in others) and i’m reading something right now and so far it’s be fairly well written right.

i’m not far in, not sure if it’s my cup of tea yet. it’s from hannibal’s pov and just. every now and then he uses the most jarring words in his head. 😭

i don’t mean like cannibal words i mean like he says “literally” (figuratively) once every chapter or so in his head lmao.

or my personal favorite.

“contrary to popular belief, humans are squishy.”

so my question for you guys is - does this ruin a fic for you? if everything else is relatively good or dialogue is moderately in character (as much as they can be for hannibal) , would this ruin it for you?