IT's hero ball, I'll admit, is annoying.
But at the same time.. the C's don't really have a go-to scorer with him, even when healthy.
For CLE, When Lebron is cold, they got the likes of Irving and Love.
For TOR, when Lowry is cold, DeRozan can heat up, and vice versa.
Who do the Celtics have? Avery Bradley? He's alright but inconsistent especially in the 4th.
That's a big reason the C's are a 3 seed and the other two are way ahead of them in the East. Along with also not having a great rebounding big (guys like Valanciunas and Thompson will feast on Olynyk and Zeller -

)