I think it is true that a) this team should be playing better than it is, AND b) this team, even at its best, is still not good enough to win a title. Those are not mutually exclusive things.
It wasn’t Danny’s fault (or Gordon’s) that Gordon got severely injured, but I think Danny may have made a bad miscalculation in trading for Irving, who even then was known as a bit of a headcase. I’m not convinced that AD was ever open to coming to Boston, but he sure as heck wasn’t after Hayward went down and Kyrie imploded. So it seems to me that Danny’s Plan A, while admirable, never really stood a chance of succeeding, which would mean he never should’ve really pursued it and should have instead developed a different plan.
Maybe using the Brooklyn picks, instead of trading them, basically was his Plan B (or became his Plan B by default), and he certainly made great picks with Brown and Tatum, but he’s put a mediocre roster around those two, and the team has actually taken a step back this season, regardless of injuries.
It’s really frustrating for fans, especially because this rebuild has now taken 8 years and hasn’t even gotten Boston to an NBA Finals, while in the meantime the Lakers and Clippers and Nets did things that only L.A. and New York teams can do and have shot past Boston in terms of talent AND title chances (and in the case of the Lakers, actually won another title). Yeah, we Boston fans are spoiled, but that doesn’t make certain realities (this roster’s mediocrity, Lakers easily loading up) any less annoying.