I agree that each coach has gotten unlucky in some ways, but each coach has also really underachieved at times relative to the talent they did have. This year Minnesota is in a group with a bunch of schools that they have similar talent to and Pitino has managed to coach his group to the bottom of that group of schools while Fran McCaffery and Greg Gard both have winning records and are comfortably in the tournament.
I don't think Tubby worked out that terribly for us. He was in the tournament 3 out of 6 years, and was in the top 25 at some point in 4 out of those 6 seasons. In his 4th year at Minnesota, he was 5-3 in conference play and ranked 16 on January 24. Unfortunately, that was the year that Devoe transferred and Al Nolen was ruled ineligible (or the year he broke his foot can't remember) and Blake would have to play point guard and the Gophers would lose 9 of their last 10 conference games. They still should have won some games (they lost to Penn State twice and Northwestern and just winning those 3 gets them to 9-9 and probably in the tournament) so it's kind of an example of bad luck and underachieving like Pitino's 5th year. Anyways, Tubby was hurt by having Maturi as an AD who wouldn't let Royce play, failed to get him his promised practice facility and by his own lack of motivation. By this time he'd already taken Maverick Ahanmisi on scholarship so the effort on the recruiting trail had noticeably trailed off.
Tubby would go to Texas Tech and do worse than he did at Minnesota. When he left Texas Tech would hire Chris Beard and almost immediately reach heights that nobody thought was even remotely possible for that program. I don't think we carry some burden because of Tubby's time here. If he went back to being a great coach at Texas Tech or Memphis then there might be some backlash. Also, Tubby turned down multiple power 5 jobs while at Minnesota (Virginia, Auburn, maybe others) so he had to think somewhat highly of his ability to succeed here.