GSW dynasty had to end sooner or later.
KD's ego just couldn't accept the fact that he won championship because he joined a championship team.
If they still had Klay, they'd be fine, but his injury is a huge obstacle. They'll deal Russell as some point, but I'm not sure what they'll be able to get. They could also keep Russell and go with a backcourt of Curry, Klay at the 2 and Russell at the 3. Wouldn't count the Warriors out yet.
If they had Klay, but they don't have Klay.
It might take the Warriors a while to be relevant again.
Even when they had Klay, Steph, and Draymond, they got beat by Kyrie and Lebron in 2016.
It was only when KD joined GSW that GSW looked invincible.