What's wrong with the Raptors?

My beloved Raptors are falling steadily into a meager class of the Eastern conference. I have trouble understanding how a 47 win team two years ago, with virtually the same core AND new, better, added pieces, can play so horribly. The Atlantic/Titanic was shit compared to where it is now and maybe there were more teams in the East to beat up on continuously. Nevertheless, I've narrowed down the perils to two key culprits:

1) Jose Calderon - This guy is a steady hand, but appears to have lost a lot of his first-step quickness - albeit, all on the offensive end - that had him blowing by PGs only a year or two ago. I know he's been hurting with a hamstring problem (is that still a lingering problem, though?) but I remember him beginning this drought in last year's playoffs vs. Dwight and Co. He is a liability on the defensive end every single night. He pretty much can't guard any starting PG in the league right now without getting beaten off the dribble and mercifully begging for help. When this happens, someone - if not more than one - leaves their man leaving someone open for an open look. The Raptors are totally inept at rotating their defenders to compensate for this constant breakdown. How many Raptors fans - who also catch an occasional dose of other NBA teams for some degree of objectivity - can attest to the notion that this team gets killed giving up open 3's? It makes me cringe to see the Raptors play so poorly on the defensive end. I believe much of the problem... [More]