I will say generally some basketball people don't like the way the Celtics offense looks. It's sort of a brute force solution to basketball instead of elegant passing/player movement.
There's a lot of mismatch hunting/screen wrestling to force two on the ball and then play out of that.
But the Celtics really don't have great passers, so... This is probably the way they should play. It may eventually bite them in the ass when they play a team that plays the kind of defense that forces you to pass faster than they can rotate.