The point of those individual drills are to improve agility and one-on-one moves.
But to grade a player on the success or defeat in such drill is pretty much meaningless, because for a blocker, the measure of success is not if you're the last man standing, but if the quarterback is still standing by the time he releases the ball. So in this way, if you haven't defeated a rusher, but you did slow him down, or ride him by, or at the least disrupted his path, then you were successful.
Also in Cunningham's case, it's not necessary that he completely defeats the blocker but that he brings the heat or pressure, collapses the pocket, or moves the quarterback, such as he did multiple times in the Colts game.