For me personally, it has to be my childhood movie, Bolt. I don't hate Bolt, and I still have positive memories of the film, but I just have a hard time getting back into it and remaining hopeful for a potential sequel or live-action remake primarily due to toxic Mittens and Rhino fans (some, not all. There are plenty of nice fans.)
Since the movie had a significant influence on some of my own stories, I try my best to distance myself from it by changing them up.

I wouldn't say that the Flippy/Flaky (from Happy Tree Friends) shippers ruined the ship for me. But I am pretty cautious whenever new fanfiction of the pairing gets posted. Will it be a fic about the pair being in love and doing cute things together or will it be a fic of Flippy (and especially Fliqpy) being very abusive and another word I'm not saying?

The whole ship is a coin toss and that's a shame because I really do love Flippy/Flaky.