While emotions is inevitable to experience in life it will be handy for a gambler should they learn to master a control over it instead of the opposite. Thier is no hurry in making money from gamble, when it is your time you won't have to play over and over again to break even before win your profit.
Honestly speaking, it's hard for everybody to control his emotion especially when making successive wins or when has no budget limits so he can gamble with more than how much he can afford to lose. Day after day, addiction become inevitable.
A friend of mine lost his job and his children move living with their grandparents because he can't pay life expenses anymore and his wife divorced him. Even though, his situation got worsen each time he achieve few winnings because he fall victims for drug and alcohol addiction. Actually he is hidden in a house wood fear to get arrested as he can't pay debts.
With a conscious effort daily taking it at one step at a time we can largely gain control of our emotions. We can reference it to a person with a quick anger issues, but when they make a deliberate attempts to work on their anger they get over it in due course.
Oh what a pity to your friend's predicament. Gambling in penury plus drug and alcoholism with divorce on a one man. With all this going on in his life he can not be satisfied with any win except a large jackpot to settle his financial problems, which is rare. Your friend urgently needs a psychological support of counselors to assist him manage to recover from his condition.
I like the fact that you used anger to make comparison to emotional control in gambling. Anger is one of the most difficult things to control yet most persons get over with stand becomes entirely different personality from who they once were. This is also possible for gambling addiction or emotional control. Most people may argue that it's not possible but the reason it didn't work for them is because they didn't put in enough effort as it should be. Though I can't fully blame them
it's obvious that casinos like Rainbet also provide tempting offers and bonuses. I must confess that this eye catching offers also draw my attention but the honestly the casinos didn't force you into picking them it was a free will decisions we all make.