There's Darkness-Induced Audience Apathy
, which when the setting is so dark and bleak that it's impossible to care about the characters. But what is it called when the characters are all such horrible, disgusting, unlikeable people that no-one could possibly like them? That's a complaint given against many comedies, but not just comedies.
Sorry, can't think of examples off the top of my head, but I've seen this many times, and I haven't seen it as a trope.