1 Many people have already made many more criticisms.
2 No, you don't even have to come up with better criticism, even back when cartoons first started and there were no examples to go off of, they knew the moving pictures had to be nice pictures
3 There are in fact no cartoons that are ugly that turned out to be classics. You can not name a single one. Every single cartoon that can honestly be called great looks at least decent.
4. I bet you can't even name a single redeeming factor of this. It's not like every show is good unless there's sufficient criticism. The fact that you can't name even one thing decent to counter how horrendous the drawing is speaks worlds to how the show stands up.
Your strawmanning is pathetic. Try to actually make an argument, though I know it's impossible to do that with the stance you're taking on this particular subject.