Eric Wareheim is the worst person on earth.
It's bad enough that this show is just "Louie Jr.", and that Aziz lacks the ability to carry the premise with his bland acting and barely formed character. But everyone else is even worse than he is, somehow.
A lot has been made of his parents, and they're clearly awkward and it pulls you right out of the show to slap you in the face with the fact that "OMG THOSE ARE HIS REAL PARENTS!!!". But the worst, by far, is Arnold - played by Eric Wareheim. Casting a guy who's notable solely for a show on Adult Swim where he dresses up like a moron and mugs at the camera for high 14 year olds puts it over the edge into insufferable territory. The guy is clearly out of his depth here, desperately trying to make his "zany" character work but consistently failing to do so. The writing is to blame too, sure. But the performance is embarrassingly bad all on its own. It's the same idiotic, one-note mugging retard bit that he does 100% of the time on Tim & Eric. He clearly doesn't know how to do anything else. And he is the single worst part of a show that already tries my patience with its attempts to be cute and clever (neither of which are ever achieved).