>>149384817Simpsons is the reason why most adult cartoons these days look like that, even back in the 90’s all adult cartoons had artstyles that tried to look unappealing towards kids, there’s actually a good video here going over how the Simpsons managed to achieve that adult appeal with its animation
https://m.youtube.com/watch?v=4Iqdp77y_3c
Other 90’s adult cartoons had artstyles that managed to separate themselves from kids shows, Beavis and Butthead looked more semi-realistic, South Park looked more janky, Family Guy was made to look Simpsons-like (Seth McFarlane didn’t normally draw like this in his other works mind you), this kind of adult-oriented artstyle trend continued into the 2000’s, there were some rare exceptions like Clone High, which had an artstyle reminiscent of that UPA-inspired look seen in most kids shows at the time.
However thanks to Rick & Morty, all adult cartoons now have to be rigged and have thin ass outlines so kids don’t watch them, you could make an artstyle well animated AND unappealing towards kids, look at Adult Swim stuff like SuperJail, Smiling Friends, King Star King, and YOLO for example, however due to the former being cheaper most would just go that route instead.