There are two groups to blame for the recent effort put forth by this team: the front office (Ainge) and the players.
Prior to the Rondo trade, there was rarely a game when this team did not play hard and compete. Remember all those blown double digit leads? Taking Toronto, Cleveland, etc...down to the wire? That was a Brad Stevens coached team. Effort was never an issue.
Danny Ainge and the front office nuked the effort when they traded Rondo for 3 bench players. We don't need no stinkin bench players. We need a leader, and for better or worse that was Rondo.
This team completely lacks an on-court leader. Every successful team in the NBA has one. We arguably had two with Pierce and KG. These are the guys who are accountable, the guys who won't take crap efforts, who will stand up for the coach when someone is benched for lazy play, who will step up when the pressure is on, who will calm the team during periods of change.
Coach Stevens cannot create that person out of thin air. I would like to believe Marcus Smart can be that guy but he is a rookie. Other than that there is no one else who fits this mold. It should be Jeff Green but he is clearly the most unaccountable player on the roster.
So lay off Stevens. If you wan't to critique his plays, fine. If you want to hammer him for not benching players permanently so we have tighter rotations, I will accept that (though that is Ainge's fault). If you want to complain that Young isn't playing enough, OK.
But please do not criticize the coach because professional millionaires are not accountable and veterans like Jeff Green couldn't care less about being a leader. That's on them, and it's on the front office who signed or traded for these players. As a season ticket holder who pays for this, it disgusts me, but at least I know it's not the coach.