It reminds me of the Sean Payton/Gary Gibbs situation. Everyone knew that Gibbs wasn’t a good defensive coordinator, but Sean kept him for a season too long. Finally fired him, GGG was hired and the rest is history!
Gibbs's 2006 was good. 2007 and 2008 were not nearly as bad as Carmichael 2022 and 2023 thus far. 2012 Carmichael was not great either. Go look at how the offense performed against better defenses in 2012.