If he's the #1 option on a team playing 8 G-Leaguers in the rotation, sure, there won't be much success. Put him on a roster with a bunch of healthy quality vets, I think there's an argument to be had.
Any clown on here making judgments on players to coaches based on the talent level of the past 36 months is ridiculous. How do you know what Billups can do with a roster like Milwaukee? Or Ant running point for the Nuggets? Quite sure there would be some different opinions.