Allardyce is far from a rubbish manager - as I suspect you also are hinting at. He took over Bolton in the Championship ( or whatever it was called then) and revolutionised their whole approach to all aspects of training, preparation and tactics. But can I point out that he got Bolton promoted to the Premiership, saw them relegated again, but because Bolton stuck by him, he got them promoted again and kept them comfortably in the premiership for a good many years. The wheels only came off their bus when he left.