C'mon, Larry Bird took a bunch of plumbers at Indiana State to an undefeated season and the Championship game vs Magic and MI State which they lost by less than 10 points. Bird had a coach who was barely over .500 wins in his career. He had nothing.
Flagg is playing at Duke with a more than decent set of teammates.
An honorable mention: Steph Curry at Davidson had little support and some teams would run a triangle and 2, double teaming Curry the whole game. In 2008, they knocked off Georgetown and Wisconsin before running into Kansas and losing by 2 points.
Flagg is good, very good, but he's no Larry Bird as a college player.