It needs to start with defense, obviously. It seems like the team is talented enough to score, but cannot close due to not getting stops. It could be the system, the players we have, or both, but the change has to start there.
But I'm afraid they won't. Despite these results being so frustrating, I bet Danny Ainge is loving this as he closes in on Okafor, Mudiaye, Towns or whoever is coming up.