People like the occasional movie where the bad guys win. But it is rarely the most popular or favourite movie. It is hard to get hyped about something and recommend to everyone you know a soul-crushing experience. If something is hugely popular you basically know the good guys win.

Because of this most content creators don't want to deliberately be in the less popular group. They need all the positive word of mouth they can get.

If you like bad guys winning you should watch/read a lot of horror.