The Jazz were ran out of the playoffs because they couldn't defend. They're in this funk right now because they can't defend.
You have your superstar guard telling everyone that he knows what needs to change and it will change. And yet, it's the same thing over and over again. This is who these guys are. Especially Mitchell. If what he saw in the postseason last year wasn't enough of a wake up call. If what he saw the last 4 games wasn't enough... It won't ever be enough.
Jazz are a paper tiger. You can't shoot your way to a championship. Because there will be enough nights that it will betray you.