Even before TO's dust-ups, they were basicly last in rushing. That's not accidental. There are more than a dozen backs that could easily move them into the 110-yd/game range. That's why they suck.
You really can not blame Westbrook for not getting the ball handed to him and you can not blame Westbrook for some atrocious offensive line run blocking.
At what? 10-14 touches a game for most of the season and too many of those touches he has been buried in the backfield. It won't matter who is running the ball. Shaun Alexander wouldn't post better numbers with that few touches and that poor of blocking.
No this is clearly on Reid's shoulders for running such an unbalanced offense.