I cannot describe the visceral level of aversion I have to mainstream shit. It doesn’t matter if the show is the best thing on earth, if the general public knows about it (And I don’t mean the internet I mean the general public) then I refuse to watch or partake in it. I have no idea why and it genuinely kills me to be like this and I have no idea why.
It prevents me from joining most fandoms nowadays unless the fandom is super niche. Things like Hotel Hazbin, Star Wars, The Office, K-pop (in general), Kpop Demon Hunters, most popular anime… WHY. WHY AM I LIKE THIS?? Is anyone else like this? Even people just mentioning “Oh yeah I love One Piece, you should watch it sometimes” makes me go “Oh fuck nah I’m good” as if the damn show was a personal insult. I feel like a stuck-up prick when I do this but I genuinely can’t control it, why???
I can’t speak to why you feel what you feel but if it’s the feeling I’m thinking of - it’s because you tend to define yourself by what you “know” or “have experienced”. If you become familiar with a piece of media like One Piece or Star Wars it becomes a part of you, defining to who you are as a person. If nothing else, you’ve spent some portion of your life consuming that thing and you’ll never get that life back - life that you could have spent doing something else more unique and worthy of the image you build of yourself in your head.
I recommend letting this feeling go as best as you can; it’s very freeing.