That's the sad part not knowing how to leave and when to leave, before betting you should know all your expectation and part of that is when and how to leave the gambling site, if you don't know how to, you will keep on depositing until you have nothing left to deposit and you are in a losing side, and this is bad ways to gamble.
A gambler that faced this frustration, losing and bad experience can eventually make him better because he won't want to experience the same failure in the future. This is for all games in general, everyone struggles in experiencing this.
But it was with his dice experience so the next time he'll play dice again. The major concern that he will think of first before playing is on when to stop and how much is he willing to spend win or lose.