22. Jim Tomsula
Technically, Tomsula was a two-time Niners head coach. Initially, he took the job on an interim basis in 2010. But he took over on a full-time basis in 2015. The franchise hamstrung him from the beginning after several star players retired. Meanwhile, Colin Kapernick was terrible so Tomsula dropped him for Blaine Gabbert.

However, Tomsula earned the wrath of fans with his lax approach that allowed the players too much leeway. The coach gave them lengthy breaks to check their phones and didn’t enforce discipline. Finally, they maintained the worst offense in the NFL. Then there was the infamous farting incident (via CBS Sports). We all know that he let rip and perhaps he should have just owned it.