That's untrue. Perhaps you didn't play casino games ever in your life. No matter what happens, even if you lose, there should always be a winner.
I don't know how to play casino games. I tend to always play with computer which more likely, I lose my money.
You can learn in in Youtube then. Playing casino
games is quite different to other gambling games. In this, what your opponent is a player too, not the computer. Thus, your probability of winning isn't controlled by computer but purely luck and strategy.