Is it normal i absolutely detest when other people "like" the same things i like?

Tinybird here. I absolutely detest when other people claim to like, or be attracted to, the strange things I am attracted to. Like tornadoes, or liminal spaces, or the spongebob outro song, etc.
The most recent thing is Salad fingers, because I have a crush on Salad fingers. I hate when other people say they also have a crush on him, or when they drew hentai of him. Which I had the misfortune of seeing yesterday. And no, it's not because I feel jealous or possessive of the character (because he's not my character, and I don't own him, his creator does.) Or feeling jealous that they will like, "steal" him from me, because that's just silly, he's a fictional character and I know he doesn't belong to me. That is not the reason why I hate when other people act like they also crush on him. It's more to do with feeling like I'm unoriginal, or that someone else feels the same way as me (or claims to). I don't WANT to be like anyone else. I want to be noticed as MYSELF and for my feelings to be known and understood as authentic and 100% my own. Therefore, it's not actually Salad fingers himself I am possessive over, but my own FEELINGS about him that I am possessive over, if that makes sense. I hate knowing or thinking that there are others out there, who feel the same way about this character as I do (despite the fact they are probably vastly different people and have vastly different views on other things). I don't want to be the same as anyone else, and I want my feelings to be recognised as being MY OWN feelings, and not being unoriginal. I feel like I'm a copy of a person when they say that and like they've taken my feelings and are "getting credit for them", so to speak. And I can't let other people take credit for my own feelings that I felt before them. I liked him the same way back when I was like, 11 as well and these people make jokes saying they like him and draw hentai of him, when I was doing that way before them.
It's not just Salad fingers either, but all the other weird things I have been attracted to. Like when people would say (often as a joke) that they are also attracted to tornadoes, or that they "had sex" to the Spongebob outro song or twerked to it. Or when somebody made a satire post where they "labelled their pussy as a liminal space", when I had come up with that idea before.
Anyway, I hate when other people sexualise the weird things I am attracted to. Because it makes me feel like my feelings are unoriginal, and like they're someone else's, and it makes me feel sort of violated in a way. That a person who probably disagrees with all the things I agree with and agrees with the things I disagree with, a person other than myself, has "stolen" my own feelings from me. It's a big identity crisis I guess. Is this normal? And what can I do to stop feeling like this?