2. Hue Jackson
Jackson didn’t have a successful tenure with the Cleveland Browns. Somehow he survived for over two seasons but they were disastrous. He left the franchise in 2018 with a record of 3-36-1 (via SBNation). Furthermore, they went 0-16 in 2017 as they went winless for the first time in history. The Browns were rebuilding (or so they claimed) but there were no signs of progress.
The head coach lost the support of his staff as well as the players. Sure, their roster was terrible, but his methods didn’t help. Jackson was genuinely a great offensive coordinator. Also, many people believed that the Browns made the right choice when they hired him. But his record is so bad that it’s almost impossible for another Cleveland coach to replicate it.