Here's what I wrote before the series started:
The Cavs have not faced any significant adversity in these playoffs. When put to the fire, they will resort to Lebron and Kyrie hero ball. Guys like Love, Frye, etc. will essentially become ball watchers sitting on the perimeter, and all that team chemistry they've built up over the first three rounds will be gone. The ball movement and the defensive rotations will slow down. With great talent you can survive like that for spurts, maybe even for a game or two. But you can't beat a 73-win team with that formula.
The theme of the past two games for the Cavs has been hero ball. In Kyrie Irving's case in particular, it's been atrocious. I really lost a lot of respect for him in this series. He's just an inexcusable ball hog.
The Cavaliers are not a team. They're a collection of professional basketball players as individual corporate entities who occasionally have a business partnership.
Either Tyron Lue has no control over this team, or he doesn't have the aptitude to recognize that isolation basketball doesn't win. I'm willing to bet it's the former, but there's no way to know.