i maintain that the main issues at work on this Celtics team are ........
1) this group was the ultimate grinders in '08. even that season, they were a little tough to watch on offense, but simply sublime on defense. but that style is tough to sustain over multiple seasons. nothing comes easy - the entire team has to work very hard and keep focus to be successful. add age and some injuries and the loss of key components like james posey and even the best game efforts can produce mixed results - even though they are trying very hard at times, they don't always get the stops on defense or the basket on offense. a lot of effort (like we saw last season) producing mixed results produces frustration and hanging heads. the core of this team is very tough mentally, but even great players have their limits ......... mental exhaustion sets in.
2) rasheed wallace probably wants to win, given it doesn't require too much pain and effort - his basic nature is lazy, take the easy way out. occasionally in his career, he has buckled down and worked, but its been the exception rather than the rule. he doesn't fit on this team.
3) rondo just looks to me like he has read too many press clippings sometimes - he gets careless with the ball and careless on defense. he also has stopped buckling down and playing the right way all the time. two years ago, he still had some humility. now, he seems to think he can get away with shortcuts.
4) as larry bird said when he retired from coaching the pacers, his experience in the league told him that players genrally tuned their head coach out after 3 seasons - it's been 3 seasons.