gambling is more on losing that success so at least you have already learn that now
No for me, there are just some people who are very lucky, like the universe is with them and there are people who are unlucky. I know being lucky is also siginificant in gambling. If there are more losing on gambling then it should not be popular, I know some people who are make living by just gambling.
Fortunately, gamble is about luck that provide success and if it runs on our individual way then we can be fail. As a gambler, we must accept sportsmanship and its consequences. We must take gamble as an entertainment that give profits even in a modest way.
Sportsmanship in gambling is a must, even if you lose big money you must accept that you're being greedy and that's why you lose big money. Gambling is more on luck that can provides happiness to people, don't be sad if you lose because I know a responsible gamblers will only use an extra money to play which can't affect your total money.