My point being that the early episodes of the show that I saw (and I think I only ever watched the first two seasons), the situations he got himself into were plausible and relatable on some level. The thing I liked about Curb was that, most of the time, I was on Larry's side when he got angry about something. That's the part that made it funny to me.
Now, maybe it's just a case of the show's on it's eighth season and it's too hard to make things plausible anymore. Seinfeld suffered the same thing, although in Seinfeld's case the show seemed to at least acknowledge how absurd it was getting toward the end.
But, hey, like I said, comedy is subjective more than any other genre, in my opinion. If it still works for you, that's great.