Durant is still one of the best players in the league on both ends. It's not translating to wins. KD may not win titles everywhere he goes but when he has been on a healthy team he wins everywhere he goes. I will say it again, KD is not the problem. This team has much bigger issues.
KD is not one of the best defensive players in the league. He's slightly above average is all.
KD is great as a 1 on 1 player, but the NBA is a team game. Being so he often faces double teams, and he is actually pretty bad against those.
He probably is a net positive, but is he more positive than Cam Johnson, Mikal Bridges, and draft picks and the team style play that team had - No way.
Is he better than Jimmy Butler and Kuminga and draft picks - No way.
What are the bigger issues - Beal's contract - maybe, but with the no trade clause that is a tough one to solve. Lack of youth and athleticism - well yeah, but that is mostly due to the KD deal.
Getting rid of KD and perhaps Book are the only possible solutions, other that waiting 6 or 7 years till we get our picks back.