What would your major examples be of shows that started of well but then became woke or pushed the usual "trendy" agendas? The first one that comes to mind for me would be Westworld. The first season was amazing, and the second season wasn't so bad, but I stopped watching after a few episodes of the third season when the one lady took out a criminal organization and then didn't kill the boss of the organization because she respected a woman in power.
If I were to bet, I would say this next season of Stranger Things will really sideline the four guys and star the shoehorned lesbian chick. The last season was the last I was going to watch because it seemed to turn into another girl power show.
I know it is a movie but I thought Logan was a good movie but the more I think of it the more I realize that was the first example I saw of the trend of the man dying and passing the torch to a much better female. I can see the new Indiana Jones movie doing that.
Hearthstone. Started playing as a young teen and liked the interesting gameplay and polish, and over time the problems started rolling in. They changed cards to pander to the woke (less boobs, sexist!) and the Chinese (no skeletons). The competitive scene was gutted and made less interesting (many good players left, or got cancelled, and poor players were shoehorned in for diversity). Meanwhile, different aspects of the UI radically shifted while gameplay kept gaining more and more bugs. They just ran out of good card ideas too. Right now the best new cards are just stat sticks or full clears that are too cheap. And the game takes too long to gain enough to feel rewarded