Winning in gambling will make your mood happy just as we get some rewards and we feel happy. These feelings are so great and we feel so energic and positive.
However, once we start to lose in gambling, we slowly move towards the sadness phase. If the loss continues and we keep on losing the money, eventually it can lead to depression.
Yes, I understand that depression is a very severe stage and it won't come at once if you are a new gambler but if you are not a responsible gambler, it is very easy for the gambler to lose his emotions and become depressed in life. Focus on other entertainment other than gambling for some time can be helpful in relaxing our mind and regrouping again to come back strongly in gambling with a strong emotion.
I think it's unethical and dramatic for something you know will happen and you choose to be surprised. You are fully aware that gambling is risky and when you put money, it's either you get something or you lose it. If you win, there should be for a call for happiness but when you lose and then you becomes sad and moody, then you just wish to be like that because you are fully aware that you can lose and you can make it hit most often, you lose.
Why would you be depressed and think gambling is the next line of thing to start? If you have money I lose fine, but you will only put your self in severe pain when you lose money. If you depressed, try another outdoor activity and if you can't do that, talk to people and engage them, not gambling.