Grossman didn't lose that game by himself. The Bears play calling was gutless. Receivers couldn't get open and couldn't hold on to the ball when they did. The entire Bears offensive scheme is so simple, Boise State would stop them.
And that defense was a joke. Take away Urlacher and you're left with 10 players who can't tackle.
The offensive game plan was a joke.
The execution of the game plan was almost as bad.
The defensive game plan was even worse.
The execution of the defensive game plan was poor, the tackling worse.
Better team game planned right, better team executed their game plan right, better team tackled, better team won.