There's a step-by-step process, but still that self-will is the important factor to achieve that goal. Quitting is not easy if you are already addicted that's the thing, and it's only you who can help to free yourself from this addiction.
Any addicted gambler that's not willing to quit, it's a waste of effort to try to help that gambler. Quiting had to be a self willing act then after that professionals and love ones can come in to give you professional advice on how to quit and emotional support from your family.
Gambling becomes a hobby at some point so quiting can be very difficult unless you find something that can replace the hobby you have of gambling. You mightn't be addicted but find it hard to quit as well because you're starting to enjoy gambling and it has become a hobby.
The fact is that quiting gambling is very difficult as we have more people suffering from losses and addiction. Also those who're winning won't want to quit as well because they're benefiting from gambling and fir then to quit means they should give up their source of income.