I'm not an artist in any way but my guess is that it looks so god-awful because it's been mindlessly designed in a way that doesn't allow for even the slightest of genuine flaws or bad features. They forget that real people aren't perfect, and that in some cases flaws on an otherwise attractive person can be brushed aside or even thought of as positively if it allows them to meet some "aesthetic" standard. The picrew shit is literal troonslop in that it only allows people to make processed, watered-down, artificial imitations of human beings.
I don't know if what I said was coherent though, it's probably my ZOG pills