If he was looking to improve defense he should of player Millsap over Jefferson when he wanted Favors to play. Burks started to play again when Mo Williams got injured. It wasn't a decision he made because he saw something. It took an injury to see that Burks was better than he thought.
I am not saying he didn't improve at all. I am saying that he actually regressed in terms of substitutions. Even at the end of the year he was playing Foye at SG and having him guard Kobe or players that Foye had no chance of guarding. He still never realized that. That is a huge problem. When you put one of your worst defenders on the team at the end of the game to guard one of the best scorers on the league. And do it multiple times and not even realize the mistake.....That is bad
If Corbin did not realize things like this that is getting worse. You cannot be at a stand still in life. You either get worse or better. If you don't improve and everyone else gets better than what happens to you? Its about contrast.
He still did not understand that Mo Williams was hurting the team. Same with Jefferson. He never saw that even at the end of the season.
After Kanter put him 20 and 20 games he went back to playing 10-15 minutes a game. Literally right after. He didn't even jump up his minutes. If anything he dropped his minutes.
There are so many things he did not improve on and actually kept doing the wrong things it was pathetic. That is getting worse. Digging a bigger hole that your standing in. He might of threw some dirt on there to fill the hole like playing Burks more after a injury or Favors at the end of the game. But he dug deeper into the mistakes and continued those more than the ones he corrected. That is getting worse. If it is not what is the definition or examples of a coach getting worse?