I think the problem many people have that pushes them to extreme comments, and yes often very negative ones, is the REASON that Rondo is struggling. It is his lack of EFFORT that is the problem and it doesn't matter what point of the season we are in, what the rest of the team is doing, or how many games we have won or lost at this point. It adds extra insult when he was just given a 5 yr 55 milliion dollar contact based on potential. I seem to recall a certain Mark Blount who was rewarded with a bigger than deserved contract based on upside that really blew up in our face. Rondo has additional skills on the offensive side of the ball that will likely never give him a label like Blount, however the feeling is the same.
Effort should NEVER be the reason that a player is struggling. No one can say that any other Celtic on that floor is struggling because he isn't giving it 100%. Not KG, not Ray, not even Sheed whose face doesn't always appear he is giving full effort. Defensively, and often when he refuses to attack on offense like he should, Rondo is not giving 100%. For that people have every right to be upset and negative.