Andy Reid at a similar time period was of similar success...and didn't get his just due, vision fully understood and proper respect until Patrick MaHomes was on the scene and the game leaned more into offense. Donovan McNabb would be a super bowl champion if he was on these Chiefs in his prime.
George Karl in this era if he could recreate or time machine that 2000-01 Bucks squad he would find success with conference finals and finals appearances.
But the not living up to expectations messed up his mental that he ain't good with the NBA. And part of that is because he feels refs cheated his teams at times, imo. He became bitter, conspiracy theorist and distrustful.