They're not badly made or anything, they're just so overused by so many people that it's very mainstream/cringy imo..kinda sucks.
I also don't really get the logic behind using a human head and a feline body at all, but yeah.
Not really a problem imo, it's just overused art that is spread on pretty much every server. But if someone likes it and so on, people shouldn't ruin the fun for them. Not like the bodies are having an negative affect on the game, I guess.
Maybe it would even inspire people to make their own pixel art, dunno?