When you fire the head coach, it’s often because the entire organization failed, and not just the one guy at the top of the coaching organization chart. When you’re looking to fix that organization, you’re going to have to look at more than just the coaching. Because if you don’t, history suggests you’ll quickly find yourself back in the position you wanted to get out of in the first place.
Between the introduction of the salary cap in 1994 and 2019, 16 teams fired/exchanged their head coach after an 8-8 season, and only four of them improved on their record the following year.