This very silly show imagines Downton Abbey with the classy upper classes replaced by blithering idiots.
The show is funniest in the way these rich people treat their servants, which is as considerably less than human, as when a servant is whimsically renamed "Chair" by one of her employers.
The wealthy are idle and clueless, and episodes often center around a sibling rivalry that the dumber of the two rarely seems aware of.
The show loves to push the bounds of decency, with characters being horribly racist and crude humor that often cheerfully crosses over the line, as in an episode that mocks rape (which one of the reviewers here is very angry about).
It gets away with this because it knows what it's doing. Underneath the silly, broad comedy, is a fairly sharp satire of class privilege. That combination of cheap jokes and smart comedy is, for me, irresistible.