With Golden State, it is almost ridiculous to find a way to "properly defend" them because they can hurt you in so many ways, and when KD, Curry and Klay are in, and all three of them can take you off the dribble, what are you going to do? They can all go for 30-50 on any given night.
Defense has never been better. The NBA is just enforcing the freedom of movement rules, so there is less grabbing. That, plus the increasing use of the 3 and the offensive skills of the players has made it almost impossible to stop offenses.
What really makes GS fun is despite the star power, they always find the hot player.