Storygnomes and Payne

Let me just get this one thing straight with all of you movie-producers who regularly read this blog:
If you take a game and make a movie out of it, and upon looking back at your work realize that you have managed to make the story and the characters worse than they were in the game, you have failed miserably. This is much more evident if the game you took only gives the player three ways to interact with things: Jumping over them in slow-motion, punching buttons/cabinets/doors, or shooting them in the face. How you managed to take this, on the surface rather simplistic premise, and ruin the otherwise actually surprisingly good story, is beyond me.
What was your intention, really? You take an archetypal anti-hero who shoots more or less everyone he sees, while wearing a smug grin and tossing around dark city noir poetry made up on the fly, and make sure he has virtually no discernible personality, who only starts killing people for real after he almost ODs on some superdrug? How is this in any way an improvement?