It sounds like he's frustrated with his own offense. To me, the comment is bland enough - it is definitely harder to get minutes here than in New York, there's a big difference in talent between the two teams. That said, it does sound like maybe he's making an excuse for himself - kinda like "if I got more minutes, I'd be back to form". Again, I don't think he's blaming anybody, so much as he's just frustrated.
This was a guy who could shoot the basketball, and that's not something that deteriorates quickly with age, but rather with lack of practice. I keep telling myself that he'll click at some point, but this late in the season there's a very real possibility that he doesn't regain his old form.