Fucking Scorsese, man. THE FUCK IS ANYTHING EVEN ABOUT?!
At the beginning of THE COLOR OF MONEY, Vincent is like Fast Eddie was at the beginning of THE HUSTLER: both want to be the best at pool.
But along the line Fast Eddie lost sight and became a hustler. He in turn corrupts Vincent.
After he gets hustled by Amos, he regains his competitive desire -- only to once again be disappointed by the hustle, even though he was on the money-side, which causes him to quit the tournament.
This infuriates Vincent because he doesn't know what the fuck just happened. This old guy told him how to play pool, he follows, now the old guy goes the opposite way of everything he fucking taught him?! WHAT DO YOU WANT??!