I listen to the Athletic Football show; their quote on McCarthy is that his career winning percentage is right between Bill Walsh and Tom Landry.
Yes, he looks and sounds like an idiot, but he is a solid offensive coach and what they call a "floor raiser"
As much as I want the super sexy high ceiling coach I"m not sure this team is ready for it given how the locker room broke up. They might need more of a boring, steady hand. That's not the opposite of Flus in the personality department, but it is in terms of competency as a head coach and on the correct side of the ball.