since 1999, 4 years before ainge took over, a grand total of 7 teams have won a championship.
duncan (spurs) and kobe (lakers) account for 10 of those championships.
wade (heat) has another 3.
that leaves the boston celtics, the pistons, the mavs, and the warriors with 1 each.
so i'd say danny has done fine, he took a poor team to a championship and, after he broke that team up, and he left us with tons of young assets.
he knows he needs stars - and so far he hasn't ever been able to land that transcendent player that leads to dynasties. but don't think that's because of lack of effort. those guys are hard to get, especially when your team has continued success and misses the lottery every year.