Ainge has done nothing wrong. He went bold in 2007-08 and brought a championship to town. We had the best team in the NBA in 2008-09, only to see KG go down with a knee injury. We went to the Finals in 2009-10. We were ready to beat the Heat in 2010-11, only to have Wade tackle Rondo, dislocating his elbow in the process. We had a 3-2 lead in the ECF of 2011-12.
This has been an unfortunate season of injuries and age, but Ainge has continually built a strong contending team in Boston.
It would be wrong to fault Ainge for not picking up certain players who happened to play well for other teams at one time or another this season - incl. Blatche, Evans, and Martin. At the beginning of the season, we had a plethora of big men, so Blatche and Evans weren't a need. It's not Ainge's fault that Darko moved home and Sully got injured. And, when Rondo and Barbosa went down, guards became a priority (especially with Bradley just returning from two surgeries), not big men. Every GM misses out on players. There is no way to tell if someone like Martin would have played as well under Doc as he is under Woodson. Knowing Doc, Martin may have racked up 30 DNP-CD.
Ainge will have a number of seasons to go bold once again. He'll have time to gather draft picks and quality players to facilitate a trade like the ones in 2007 (Allen and KG). Ainge and the Celtics owners know that superstars win championships, and Ainge will have time to find his next superstar. If he strikes out on that guy, then maybe his job is in jeopardy, but he's nowhere near that point now.