I am not sure I'd call richt a failed regime. He won 19 games his first two years and the games we lost tended to be games when Manny was destroyed by a good OC. His last year, I was super critical but you could see something was off. Richt did give us infrastructure we lacked.
As far as Manny, Temple was not necessarily a dead end job for a first year coach. Other coaches have turned that job into a spring board recently.
Manny is a fraud. He is also a super lazy recruiter and insecure. I always say, hes like a guy who won a coach for a day contest. hes not a football guy, hes more a video game guy. his insecurity also made him want to be friends with the players, not their boss.