I don't even think the problem is Cignetti is/may be/acts like a jerk.
It's that he's acts like an arrogant twit when he just arrived on the scene as a national championship winning coach. He's coming across more like pompous Brian Billick, when the Ravens won the 2001 Super Bowl despite going a month without scoring a TD at one point during the regular season, than Bill Belichick, whose trophy case reflects a guy who had what it took to come back again.
I'm not a big fan at all of Mike Lupica, who fits the billing above as well except he's never won a damn thing. But I recall his sneering the next season when the Ravens got bounced out of the playoffs by the Steelers (pretty handily). He actually did a pretty eloquent roasting of Billick coming across like a guy who thought he invented the game. And that's when he referenced John Wooden attending the 1991 Final Four when it looked like UNLV had the horses to repeat as national champs. When the Runnin' Rebels lost to Duke in the semis, Wooden was asked how great UNLV still was and replied, "Well, a lot of teams have won one in a row."
There's one thing more difficult than getting there: staying.
And who has stayed? Using AP and UPI (sorry, folks, I don't consider legitimate national titles when the teams that "won" them didn't even know they won them)........and then BCS and CFP......
Minnesota (1940-41)
Army (1944-45)*
Notre Dame (1946-47)
Oklahoma (1955-56)
Alabama (1964-65)
Texas (1969-70)
Nebraska (1970-71)
Oklahoma (1974-75)
Alabama (1978-79)
Nebraska (1994-95)
USC (2003-04)
Alabama (2011-12)
Georgia (2021-22)
And let's face it, MOST of the titles prior to the last two teams involved quirks in the voting system such as not counting bowl games (or counting them in the case of 1965), multiple selectors, and being able to avoid the "other" big contender (Nebraska did not have to face Penn State in 1994, and USC did not face LSU in 2003, for example).
Let's see what Cignetti puts on the field the next three years before we crown him the next Nick Saban.
* - if any national champion ever deserved the asterisk, it's Army during WW2.