According to https://knowyourmeme.com/memes/kyle "Kyle is an online caricature [...] "Kyle" is generally presented as rage-filled and aggressive, and he is a fan of Monster Energy Drinks and Axe body spray"

It also says, tautologically, that "Kyle jokes parody of a certain kind of person with a set of characteristics one associates with the name"

I've never heard of a negative stereotype about Kyle in America either.

American, never heard anything bad about the name Kyle.