I hate to burden you with actual facts, but we won more than 20 games in eight out of Sampson's 12 seasons. We won 25 or more games five times.
In his final seven trips to the tourney, Sampson's teams went to a Final Four, an Elite Eight, and a Sweet Sixteen.
So your characterization of Sampson's time at OU is not at all accurate. In fact, it's ridiculously inaccurate. But then, the Sampson haters never really cared about the truth. All they cared about was that Sampson wasn't Billy Tubbs. That's what they've never been able to forgive him for.
Most folks have learned over the past five seasons that winning is a lot less "boring" than losing, regardless of the style employed. After all, among the most frequent complaints voiced about certain of Capel's teams have been the lack of heart and hustle displayed and the lack of hard-nosed defense, which were hallmarks of Sampson's teams.
So it would seem that the majority of the Sooner hoops fan base have learned (the members of the ABS club will seemingly never learn, but they are an embittered minority) how good we had it for twelve years and would prefer annual trips to the Big Dance, even if it meant occasionally being disappointed by early departures (which, let's face it, happen to most programs) and a defense-first approach to the game.