K's worst period of coaching was from 2005-2009 when Duke underachieved in the tournament with experienced guys like Shelden, JJ, Nelson, Henderson, etc.
All his teams with multiple OADs besides the 2017 squad with Tatum and an injured Giles made at least the Elite 8 which is really impressive.
2015: Natty
2017: 2nd Round but lost to a hot South Carolina team in Greenville, SC
2018: Elite 8, bad Allen bounce away from the FF
2019: Elite 8
2022: Final Four, lost to a bitter rival at the very end
At least we didn't lose to USC, Auburn, Michigan, Northern Iowa, Bradley, Bucknell and Stanford before the Sweet 16 this past century.