I have Tucker's book, have read the blog, and think he's hilarious.
I don't know what went wrong here. Whether it's proof that being a good author doesn't make you a good screenwriter, or perhaps some other authority overpowered his creative genius, or that no one reviewed the footage to see if anything was "clicking" onscreen, or perhaps it's because the descriptions and thoughts he had in the stories were where the humor lay, and those elements must be translated or lost when moving to the silver screen. In fairness, the dialogue rang true of TM, but was deprived of its punch, either by poor delivery or by the fact that many of the funny lines were possibly just too long to work when spoken aloud. Sorry TM, I wanted this movie to rock.