I'm assuming el_boss has never read the books. My bro didn't like the movie for the same reason. Although I do admit to the plot being a little too black and white, the whole series is fucking awesome. And NOT because of the movies.

I can acknowledge that they left a shitload of stuff out of the book. I can also acknowledge that a few key plot points were changed. But still, the movie worked, and worked damned well.
This is pretty much my take on the movie.