Tbh (im ignoring the ultra copers, I put some of them, including the Kanji larper, on ignore finally, they became nik level not even worth anymore to make fun about) i see 3 problems whey they are like this:
First ever since the wano ended oda has shown one thing clearly: Title merchantary is just cheap hype. Kaido was smoked by a rookie, we see in GV that Whitebeard was the WSL, world's strongest larper, and i dont think we dont need to talk about WSS
Literal (sane) mihawk fan is saying this btw,
And Loki is another nail in that, this includes Yonkeks
Second: Loki will be, ultimately, like every character, be powercrept, and some people are also mad about that.
Like, sure Loki is injured and a still growing character, so if he we gonna see him in the final war he's gonna be even stronger, but the things we see/get hyped for will be outgrown. Which means even more characters be left in the dust with the new ceiling Loki is setting right now
Third is, similar to wyper, Loki is just way cooler and more interesting than Goofy or CoH as a character, so i think they are getting mad at that.
I think loki triggers more fanbases than even a character like damaji does, which i until now considered the king