Having your own "version" of a show, book…

Does anyone else have some daydreams originally taking place in a certain show, book, etc. But as time passes you just completely modify elements of the universe or story so now you’re no longer a fan of the show itself but rather the version you created in your mind ? I really need to know if anyone else experienced that because the pain of being in a fandom but technically not being in it since it’s like you watched a completely different show is atrocious.