On various fronts. The overarching subject, the sense of hopelessness, helplessness and despair, the long-winded, meandering way the story is told (which is on par with the idea that it is a stream-of-conscience recount), and the purpose way in which this guy's obliviousness is made plain (and cringe-inducing) for the reader (and the teller).
Found it brilliant, at points boring and quite maddening.
Oh, and I leave it with a feeling akin to what Catcher in the Rye left me.