What, like _Lost_ where fan theory was that there were no answers and that they were actually all dead and in some sort of weird purgatory and the showrunners insisted that there were answers and that they were alive and there would be a conclusion that made sense of it all. Then the conclusion was that they were all dead and in some sort of weird purgatory and there were no answers? Note that the writers apparently say that is not the case and that they really were alive on an island and just all dead at the end, but that apparently was not obvious to people who actually watched the show, so I'm going with they were dead the whole time.
Nobody who was paying attention thought that. It's made abundantly clear in the show what's actually happening.
I've never watched _Lost_.
That much is obvious. Spoilers ahead, FWIW:
Most of Lost takes place on a remote island where mysterious things happen, including the deaths of quite a few main characters. There were a lot of fan theories about the island, whether it was a government experiment, the afterlife, limbo, someone's dream, etc. None of these were correct. The first five seasons, and most of the sixth, all take place entirely on planet earth, among actual living people. In the last season, there are a series of scenes that take place somewhere else. Surprisingly, these scenes include some of the characters that died in previous seasons. This is eventually revealed as the afterlife/limbo subplot, which provides an opportunity for some character arcs to have more closure.
The main reason being that, as soon as I heard the description for the show, I assumed that they were all dead and living in some sort of weird purgatory (not in those exact terms, but basically). I really didn't want to watch that concept all over again.
That's too bad. Personally, I've watched the series beginning to end probably close to ten times. It has many flaws, and some people hate it for them. But to me, it's the gold standard of what TV should be: Intriguing, funny and it doesn't take itself too seriously. Most of all, though, it's surprising; it's one of the few shows I've seen where if a character is in peril I'm actually concerned because they kill off main characters so readily. It's also the only reason the limbo subplot works; by that point in the series there are more dead characters than living ones, by setting the final scenes far in the future after _everyone_ has died, it allows for a more memorable and satisfying ending IMO. Lost always goes big, and goes where you don't expect it to, that's part of the charm. I would consider giving it another shot.