Bargs is a terrible defender. He's also the most pathetic rebounder for his size, probably of all time. These ARE facts. A 7 footer who averages 6-ish rebounds is pathetic. There's no other way around that.
I'm not really interested in what the writer points out, where he doesn't speak with a high level of familiarity with the team and their roster. "worst defender and the most pathetic rebounder for his size" ... source that 'fact'. Might as well say, "Everyone else is like a billion times better than him". Just annoying that a publication like ESPN puts out this kind of rabble.
He's not elite. Elite means you're the best, which he isn't. He's just good. If elite were a 10 out of 10, Bargs would be closer to 7 out of 10.
Bargnani is a 1-dimensional player ... and he is elite in that dimension. You need a balance of elite talent to be a contender. So the answer is to keep the elite talent when you have it, and find other pieces that balance the roster (hello Ed, hello Jonas).