First of all, I apologize for thinking you were a woman. I assumed that from the queengab moniker.
Let me reiterate what others have said in response. The Raptors have given Bargnani more chances than I have ever seen a player get. And it is ultimately up to the player, not the organization. GUys like Dirk have taken it upon themselves to do what was necessary to improve. Obviously you want the team to give you the opportunities, and Bargnani has been given them. They've brought in coaches who were good teachers, they've brought in veteran players who were good mentors (Nesterovic), they've given him plenty of playing time and even fired a coach, in part, because he had too short a leash on Bargnani.
Bargnani's had 5 years and LOTS of time and opportunities to improve. We've seen no improvement in defense and rebounding. None. With young player you, at least, want to see development. And we haven't seen any with Bargnani in anything but scoring. That tells me he simply doesn't have the tools to improve very much. It's like asking Amir Johnson to become a 20 ppg scorer. It's simply not going to happen.
We do agree that it's best for the Raptors if Bargnani is traded.