Well, it's not disappointing really, it's just recognition.
I have no problem with how the system works, it's silly, it's unbalanced, it's all based on illusions, but here it is...
You can either feel disappointed and become all bitter and twisted, or you can just play the game. In many ways, it's fun, especially when you get that perception of clarity -- compensates for all these years you were the pawn.
Disillusionment.