People seem to love to second guess, after the fact, when all the uncertainty is removed.
Hayward? At the time, I felt is was an overpay. The signing ended up hurting the team due to injury so in a way, we will never really know what could have been. Not too many were criticizing Ainge at the time of the signing.
Then came Kyrie. I thought this was a great trade at the time. Kyrie turned out to be a head case. This is something I guess you could have determined before the trade. I think the Celtics knew he was a head case but decided to take the chance on an elite player. I have no problem with this trade.
Now with Kemba, I was not big on this but then for a stretch, Kemba was better than I expected. Injury or wear and tear ended up being his demise.
So you can say that the Celtics were 0-3 on these big moves. Missing like this on 3 moves like this would devastate most teams. The Celtics are in pretty good shape considering.