You are focusing too much on the plays he didn't make today and not enough on the plays he did make. He created good penetration all game and didn't give Wilson time to stand in the pocket on several plays, and held his assignment and made a play after it broke down on a few others (Whiz alluded to it in his post-game radio interview --- if Dockett would have come running in after a play broke down chances are Wilson could have broken it for a huge game -- instead, he held his position/gap and held him to a modest gain). I'd bet if you go back and watch the tape with a coaches eye, you'll see he did exactly the right thing and was right where he was supposed to be on almost every play. You do that enough time in this league, the plays will be made.
Overall, l I am sure glad Dockett is on our team and not on some other. Our defense is probably the best part of our team and is is certainly a big part of the defense.