There are a lot of gambling sites that rely on the skills and techniques for you to win the game, but actually that is what you should prefer to play compared to those gambling sites that only rely to the luck of the gamblers. Aside of playing you are also thinking or analyzing which is really important to maintain and boost the way we think.
Here is the link where you can learn some games that may require skills and techniques to win, and they also listed some ways for you to win:
https://www.gamblingsites.com/blog/100-ways-to-win-at-gambling-16240/Information on that site is honestly good but you should have read fully the article first before sharing it here for much better introduction. Almost all gambling games listed there are dealing against the house.
We can put it this way:
"How to deal against the house on some gambling games"Literally, we can't as no one can control the output. But suggestions on that site might help others especially the part of
"managing the bankroll". That's what I always say how to deal with house-edge games and not basically a strategy to beat the house since it's impossible. By properly managing the bankroll, somehow a gambler can play in the long-run.
Card games I think will also require luck. Good cards would give you the win and if you are not that lucky enough, you would lose the game, as simple as that. This only shows how huge luck is, as a factor in gambling.
Bad cards don't mean you will lose on that round. It's just that it gives a gambler an additional task which is to analyze deeper to find a better card formation from head to toe.
There are lots of times I survived a certain round with bad cards especially in a game called Chinese Poker.