The officiating is god awful in the NBA. I think this series has highlighted the flaws with NBA officiating, but the Celtics have to play around that kind of adversity. The Celtics have to be consistent all 48 minutes and not just the 1st half.
Basic fundamentals the Celtics don't do:
Rebound
Box-out
Double-team Wade and James all 4 quarters. They're too good for single coverage. C's don't have guys like JO, Wilcox, Bradley or Green to through strength and size at Wade, James, and Haslem.