I can't agree with this. To simply put, I fully agree and understand with what Manning is saying. But at the sametime you have to have a level of competence in your coaches. You need coaches who are good enough to out coach opposition. To make gametime adjustments to expose weaknesses in opponents. Mismatches, covering your own weaknesses, etc.
We didn't see that with Rizzi anywhere on the field on either side of the ball. The defense started getting more pressures but the run defense didn't improve at any point hardly at all. Nothing worth noting anyways. The offense couldn't ever get in sync. We lacked discipline. A lot of it. Everywhere.
Depending on who the head coach is, retaining Kubiak would help to Mannings point, on the flip side of that we're opening the door that its possible that he was part of the problem, which I think is unlikely, but we can't rule it out.
I'd rather us just start fresh with a whole new coaching staff.