I lost 100 dollars in my first gambling experience. 
Did the gambling site promise that they are going to let you to win? Were you expecting that bet to be a sure win? People coming in here saying that their worst moment is that they lost. That's the only thing gambling makes you do, it makes you lose money and you know that quite well both from experience and theory. I see no reason for you to be mad about that happening unless you were delusional enough to think that you're going to win in gambling. SMH.
Yes, it is the greed which make us loss in gambling. I remember a few months ago, i played dice and was winning together few consecutive wins. I was playing with a strategy and keep on investing slowly. Just than greed came in and i invested all my profit at once and lost that on a single dice game.
Anyways that was part of the game as there are many good moments in gambling too. It is a game where you will enjoy both the moods, Good and Bad, depending on the luck.
Anyways that was part of the game as there are many good moments in gambling too. It is a game where you will enjoy both the moods, Good and Bad, depending on the luck.
When you won, were you not being greedy when you put that bet? I think greed was present on all situations so greed isn't really what to blame. It's all just math and according to the math behind gambling, you are doomed to lose.
Self control is for me the best attitude we need when we gamble.
For me it's being realistic. When you're realistic, you don't need self-control in gambling because you're not going to be gambling at all. You would know that casinos, both online and the actual one, are services that are made for the owners to win. Everyone's sobbing about their losses and very few are enjoying their wins. Just knowing how significant is the possibility of you losing over winning should be enough to wake you up and stop you from gambling.