>>107300218they're ugly and they look stupid and because of this, they're just weird social outcasts who sit and watch tv all day. their designs aren't necessarily threatening or offensive, just comedically ugly. the old artsyle contributes to this by giving them freakish proportions and features (flared nostrils, jew noses, underbite and overbite, weird foreheads).
compare this to the redesign where all of their ugly features are diminished or outright removed and their normally ridiculously braindead expressions are replaced with threatening smirks.