Paul Pierce, KG, and James Posey won us a championship in 2008. Period.
We would have won if KG was healthy in 2009.
We should have won in 2010 but we got robbed in the fourth quarter.
As for 2011, it's pretty simple: too old, too injured. Nobody's fault. Celtics did the absolute best they could, from coaching, to trades, to playing. It just wasn't enough.