Brad has been a giant failure this year. But arguably his biggest failure is simply being unable to manage this team's talent. Not only does this concern the chemistry and his mismanagement of minutes not letting guys get into their grooves, but his inability to motivate his guys to play a full 48 minutes.
It's becoming more and more clear that he's not the answer for this team. He just has not shown an ability to effectively manage a team with this much talent, which is virtually a necessity to win in the NBA today.