Fact 1: He almost did.
Fact 2: South Florida is the greatest hotbed of high school football talent in the country.
Fact 3: He is a solid recruiter with a history of producing NFL talent, especially with regards to nurturing QBs and RBs.
Fact 4: At the time of his hire in Miami, he was one of the top ten winningest coaches in college football.
Fact 5: Miami had won it all 5 times, and came very close another 4 times, within the previous 35 years.
Supposition based on these facts: Mark Richt can finally win it all in Miami, and return Miami to prominence.
So it was a fairly reasonable supposition based on the aforementioned facts.
But it turns out that supposition failed to account for a particularly crucial, but at the time not quite as obvious, fact:
Fact 6: The game has passed Mark Richt by, and his stubbornness prevents him from the kind of adaptation and innovation necessary to win in today's game.
This final fact unravels the previous ones. Unless Mark Richt can pull a Jocko Willink and own his failure and in turn hire personnel who excel at what he's now shown to be weak at and shown to be clear shortcomings on this team (OL, QB, offensive play-calling, special teams, strength and conditioning, linebackers), then there is no turning around this program under Mark Richt's leadership.