When gambling for fun, it makes everything much easier for the player, he does not need to worry about following many rules, because he can easily afford to lose what he deposited, because the amount is not large. And in this case, the disappointment from losing will be minimal, or will not have any effect on the player at all. This can be regarded as if you decided to go bowling in the evening, but instead you decide to gamble with this money, then you would have spent this money on entertainment anyway, this approach also takes place.
It's all fun until large amount of money is involved in it. You see people talk about fun in gambling but on the other end, they are using large amount of money to wager, risking too much they can afford to lose. Yesterday, someone paste his whole account to stake Portugal against Spain and gave Portugal win including extra time or penalty and it work for him, you should see what he won but at what cost, risking all you have just because you want to make fortune.
You can imagine how it's going to be later if such person had other game tomorrow and then he thinks that doing such risk again is going to work and in the end it never works, he is not just going to be broke, he is going to feel the wrath of brokeness and make gambling a scam thing mean while you are the one that gamble all your wealth away when you can simply just put what you can afford to lose, gamblers need to do better when it comes to risk.
I think that emotional control can only be controlled by going through this path on your own, gradually over many years. It can be instantaneous, it's like a lifestyle, we should look at the experience of others too, to try to try it on ourselves and what we felt at the same time. In addition, communication with like-minded people helps to look for these keys to success in training emotional intelligence, because one cannot find all those things that will help us. In general, there are many subtleties, you need to collect them and invent a system of training emotions for yourself, over time the result will definitely come, if we are teachable)