Developed from Crowton's labors. A coach running the program into the ground would have left the cupboard bare. Bronco doesn't have his success from 2006-09 without the contributions of Crowton. Those would have been rebuilding years if Crowton was as inept as you claim
I didn't follow Crowton after he left. I only recall that he was the OC for a top 10 SEC team. That doesn't sound like marginal success to me