(Okay, this will have spoilers for Rick & Morty basically- I'm just talking about a few shows, like; The Owl House, TMNT 2012, and obvi Rick & Morty).
I just remembered there's some episodes from a fandom that they like to think is better to forget. Like The Owl House with Once Upon a Swap, TMNT 2012 with the Mutant Apocalypse and so on. I thought for Rick & Morty, it'd be the episode where Morty gets a dragon... for obvious reasons. My brother reminded me of the episode where Jerry gets a fortune from a cookie and it's about his mom. That just made me so uncomfortable when I remembered that one.
Rewatching the show on a bingewatch, I got to see the two Beths see eachother- their first ever interaction. It made me remember how they progress as time goes on for them and I didn't like it either. So from the top of my head- Rick & Morty has three different episodes that I'd rather not watch. But since I'm such a fan for the show, I'm watching them anyway- and will suffer the consequences.