I can't tolerate NTR (cheating), harem, manipulation, dumb MC, sometimes love triangle drama is unbearable to me. I can bear physical abuse (i mean i like psychological theme) if the MC is smart enough for her to escape from the so situation, but tbh that was RARE i thnk.
I've read countless smut manga and shoujo that maybe manipulation and NTR is the MOST that i can't tolerate because this element is really common in there.