Perhaps forward speed was simply not enough after that climb to push the tail down to avoid the crash. So sad...
Another poster commented that an expert pilot should be able to compensate, and I think the last second maneuver which kept him out of the stands was that compensation. It takes a moment to realize the plane is not responding to control as it should, and he had very little time to try to correct his flight path.
I do not consider myself an expert on aviation by any standard, but the additional drag by the trailing trim tab on the elevator and the loss of effective control surface may have thwarted his efforts to get the plane up.