Cal has a lot of coaching flaws. He's very stubborn and the 2010 team and the 2015 team are going to go down as epic disappointments for not winning titles. UK fans also blame him even more because these 2 seasons, his failure to win with clearly all-time great UK teams, gave Duke 2 more titles. Some will never let him get over that.
With that said, generally, Cal is above the par for teams that have huge player turnover and OAD's. Look at many of the one off years when a coach has OAD? Look at Tom Izzo, just with his class this year? Barely made the NCAA's, and people would usually put his "coaching" above Cal's. Look at what Sean Miller has done with his OAD's? Never made the Final Four. Bill Self since he started getting OAD's? Never won a title. Made 1 Final Four.