Part of that definitely comes down to their stars (although Kyrie was working his ass off on defense in the second half, somewhat surprisingly), but most of it is definitely on Nash imo. Not just in preparation, but also in personnel choices. Like, he had Dragic out there waaaay too often late in the game when Dragic is completely cooked defensively at this point in his career (or at least has seemed that way lately).

Maybe it's because of the system that Nash came from when he was a player, lmao. But yeah, they just don't seem like they discuss team defensive scheme at all, really. It's all about individual effort.