Having the best player on the field doesn't mean you give him the ball every fucking play. You can use him to great effect with some play fakes. It sure doesn't mean putting him in a one back set with nine defenders on the line and every single one knows that he's getting the ball because the coach doesn't seem capable of anything creative. Almost no deception in the second half. Likewise, Bijan is one heck of a threat as a receiver. Get him the ball over the middle when all he has to do to get some clear running room is lose one linebacker. Third and two for the offense is a death sentence if only one player is getting the ball.
How about three or four five-ten yard QB keepers, just to keep some of the tacklers off Bijan?
Looks to me like Sark's brain short circuits when the game is on the line. He freezes up. The offense didn't win that game, a tireless relentless defense did. Sark almost gave it away, and without that fumble that's exactly what would have happened.