Can't blow out every team every game. Is this Celtics team capable of blowing out a good amount of teams? Yes, of course. However, doesn't mean it will happen all the time. NBA players are professionals...Even 9th, 10th, 11th string, etc, players are better than most people in the world.
It can drive us as fans nuts to see the team play below what they are capable of, especially against the Charlottes, Phillys, Minnesotas of the league, but it is bound to happen here and there. What matters is, I definitely feel that the team is trying this year, more so than last. They are not going in many of these games playing with the foot off the gas. Last night was just one of those games where they just didn't have it for the bulk of the game, but they scrapped, pulled together at the end and did what they had to do. A win is a win.