If you don't see the problem with the OL's run blocking, you are a fumunder engineer.
Hey, a beat up over the hill ex-Cowboy running back managed to gain 1,000 yards a few years back running behind a Cardinal offensive line. He did that by making the first tackler miss on almost every play.
If you can catch Beanie before he gets a full head of steam up, he is easily tackled. Once he starts running down hill, it's like trying to stop a freight train.
I think Beanie can be an elite back, but he needs to stop whining and work harder. Whis is not going to give him the starting job. He has to earn it.