If The Matrix was a 9 or 10 and Reloaded was maybe a 7. Then Matrix Revolutions is a 3 or 4.
Worst movie I've paid to see at a theatre in a long time. But I say that with a big caveat. No set of movies had built up expectations like The Matrix. Movies like "The One" that came out a year or two ago weren't any better than this. But the Matrix, and the story behind it, had been hyped up beyond belief.
A lot of the problem appears to me to be one of editing. A few extra scenes, a few scenes cut, and epilogues could have made a big difference. Instead, we're left with something that isn't really a conclusion but more like the end of a chapter in a larger story that I no longer care to know more about.