You say that the Celtics have blown 4 straight drafts including 2014 and yet you say the jury is still out with Young and Smart. That doesn't make any sense bro. Not to mention they aren't that much younger than KO or Sully. I'd say the jury's still out on them too. They haven't been perfect by any means but they haven't been total scrubs who haven't proven a thing like say Anthony Bennett or Dante Exum.
Didn't we get this same kind of sentiment a few weeks ago when someone was saying Ainge wasn't a very good GM because the Celtics haven't been contenders year after year like they used to be? It's not the Celtics or Ainge, its the circumstances that they are put in. At a glance, yes, Ainge blew the picks getting Jajuan Johnson and Fab Melo, but they were picked around the end of the first round. You need to understand, when the NBA draft gets to the later picks, the odds of you finding a good to great player lower drastically. Especially by the 20s. That's not a good example of blowing a draft. That's simply missing the pick that is more likely to fail than to succeed. Now sometimes, the latter end of the draft has some good players, but they are far and in between. The number of guys who are drafted in the latter part of the draft that don't make it in the league vastly outweigh the ones that do. And the players from the latter round that do make it very rarely become something special. Draymond Greens, Jimmy Butlers, and Deandre Jordans are diamonds in the rough.
Blowing a draft is when a team blows a lottery pick because that's when the best players are usually available. That's something the Celtics haven't had the opportunity to do for a while until 2014. A good example of a team blowing a pick is Sacramento in 2012. They drafted Thomas Robinson #5 over Jared Sullinger, who play the same position. Sully, even if he has had weight issues that are becoming alarming, has proven a lot more than Robinson. Robinson has yet to prove anything and has played for 4 teams in 3 seasons. Not to mention they took Robinson over Damian Lillard and a few other notable talents. That is blowing a draft. More examples are Washington taking Jan Vesley over Kawhi Leonard. Or Minnesota taking Jonny Flynn over Stephen Curry. Or Cleveland taking Anthony Bennett over practically everyone else in the 2013 draft.
I think the reason why people come to these conclusions is because they expect consistent perfection from their teams. That simply doesn't happen. Even the best make mistakes.