In my opinion, their psychology is a bit disturbed after losing a bet or other types of games, they are unable to bear the loss after losing and regret their actions. Regret is like punishing yourself for the defeat, this will only make your soul shaken or even excessively depressed.
Whoever it is they must be ready to accept defeat because when they bet there is no coercion from anyone, moreover there are only two possibilities in gambling (winning and losing).