Having confidence on something which you don't really influence anything sucks you.
Accepting for what your losses on the gambling are the only solution for you and after that, you should stop gambling and take a rest. You can come back in the other time with a refreshed mind that could help you to get a big win although that is not guaranteed. We see many people/gamblers cannot accept the losses and make them get a high tension because of the amount of the money they are losing. But if they cannot accept the losses, they cannot move on from the losses, and that will be the end for them.
Many people does not realize the damage and the loss, until they actually face the loss. They do not take gambling seriously and think that they cannot lose big in gambling. They only realize that they have lost big amount of money in gambling and its too late then to go back and recover the loses. A lost in gambling is a lost forever and in most cases it is impossible to recover from such loses.
Both of you are right, and they never think about how big they lose, they still playing gambling. For some people, the loss is normal, and they will not feel anything bad, but for the other, the loss will make them stop playing gambling. The defeat reminds us of the risk of playing gambling, and we have to think to continue or to stop, and it's not because of if we continue, we will have a chance to win, it is not. No matter how much money you lose, you should accept the defeat so you can decide what you need to do next.