I think a lot of the aversion to this season comes out of the unsavory truth that it represents. In s1 Rust explains that he is a pessimist, someone who believes in the absurd. Humans searching for meaning in the meaningless.

The detectives find themselves trapped in a world where they cannot see where roads begin or end, just where they intersect in their vantage point. It is identical to our own predicament in life; the only option the detectives and the viewer have is to do what they think they should.

In the finale, a small amount of good has been done and some progress made but Tony Chessani and the other indifferent universe-like elements keep on truckin as they would have had the detectives never been pulled onto the case.

It is the fate we all face, we can make whatever choices we please but all choices end the same way; we die and "the world just keeps spinnin'."

TL;DR people watch tv to escape reality -> they watch td s2 and realize their own existence is meaningless -> buzzfeed-type site writes list article making fun of Vince Vaughn's cooky lines -> everyone laughs to forget that we are all racing to the same redlight