For me it is definitely the latter. Quality has always been my gauge to measure how good a piece of media is. I'm mostly open to all genres of media (the only exception being music which I'm really choosy about), but I drop them easily if they start to bore me. I do give second/third chances in hopes that there is still something to salvage...though I do that very selectively.
If it romanticises/sexualises rape/incest/pedophilia I'm not even gonna bother reading it, if it starts to be fucking boring or features any of the above 40 chapters into the story I drop it like a hot potato.
To me it's probably artstyle, I had so many manhwas I liked but once an artist change happens (usually for the worse) it kills completely my interest for it. The same happens with videogames, I can't play something I find ugly
when they brush off SA or rape like it's nothing instead of confronting the sexual offender and when the story gets repetitive or has too much miscomunication i hate the miscomunication trope
Genuinely curious to know. To one person it might be a question of morality, to another it is a question of quality.