Why does this surprise anyone? The Bills have sucked for the last decade because of poor drafts, poor FA decisions (both in terms of players signed and let go), and three head coaches who weren't up to the task. Two of those three HCs have gone on to have success again as assistants, and the third may very well be a good DC in the league again. That said, none were head coaching material, and with a few exceptions (mostly at the OC position), we've had pretty good assistants and coordinators throughout the decade.