Out of sheer morbid curiosity, as an autist and a writer, things like this fascinate me. I like to know what not to do and how to avoid it where possible. That doesn't mean it's never happened to me, though, there's been a few times.
Now, I'm not talking about like gay characters in a show and you're not into that thing. I'm mean the media equivalent of receiving a great blowjob and then suddenly you get a finger in your ass that wasn't part of the original offer.
Mine is the show, The Magicians. I knew it would be lefty-leaning because that's just how the books were and the cast was diverse in hollywood's favorite way. That said, I was in for some trash and the fastforward button was for the parts I didn't like. 3 seasons in, I like the dumb plots and the sudden twists, then, the show decided to pull some stupid fucking meta and lecture the audience: Rasheed starts to lecture us that you're a racist, sexist, bigot if you don't watch/read something because the main character isn't white and male. After that, I completely skip a couple episodes, because fuck that bullshit. I calmed down and the first episode I watch, they killed the main fucking character, a white male. Series goes on, I do not. The whole fucking scene was the producers trying to guilt the audience into not rage-quitting the show by calling us bigots. After that, I decided I was never watching another syfyllis network show again, or one with a racially diverse cast, especially no Rasheeds.
I was into the Lethal Weapon TV Show Remake for the first season, it was pretty good. The killed off the MC in the second, because Wayans in a bitch made pussy who was mad that he was getting sidelined in the show he was producing, and forced the actor out of the show to make it all about Himself, Mr. Wayans, the REAL star of the show.
The show predictably got canceled and failed, because Wayans fat head and ego cost him everything.
The actor got shitcanned because he was a fucking violent drunk. Wayans' self-importance aside, the actor was a piece of shit.