Theoretically speaking if you could predict the algorithm in an online casino wouldn't you be able to predict the game and win a lot let's just say you had access to the algorithm and you were able to replicate it you would practically be able to win all the games
Actually, casino games are not easy to predict, we often predict because we are gamblers, we are always looking for a pattern but we don't win and still rely on luck. The only thing that can be predicted in gambling is probably sports, our predictions are often correct here, but not in casinos.
In short, if it's just like playing slot games in a casino, there's no need for techniques or skills. Then I didn't see anything in the casinos that happened in one day that most of the players who played on their gambling platform just won.
It seems that what you said is correct: most gamblers lose, and that is the design of casinos to always give the majority of gamblers a losing experience because that is where they make more money in the gambling business. They really have control; gamblers don't.