Hating, or not liking someone for always winning when you are always losing; we can say is a result of jealousy, envy, and fact is, some people really don't know how to control themselves with issues like this.
Take a look, read the story in the shot I share below, and tell what you will do if you find yourself in a similar situation.

- will you (for the sake of peace, maybe to hide your envy, jealousy) continue to go gambling with that friend? And continue to lose your money?
- or will you tell him point clear that you are no longer interested in going to gamble with him? How are you gonna do it so he doesnt suspect that you are not happy with his constant winnings, when you are constantly losing?
I really hate when I see stuff like this. It just shows the true nature of most humans. This dude literally begged this guy to come to the casinos with him, his friend turned out to be super lucky and always wins, but yet he loses. Its hard to not feel bad for the guy who always loses but he should be happy for his friend. That's like teaching your bud how to play baseball and him becoming a huge star and you're just stuck in the outfield and cant make any catches or help plays move along. Maybe its time to find a new game my friend. Gambling isn't for you. The universe is telling him something haha