There are is also luck factor in the game. Sometimes I would get lucky and unlucky in a game session. I saw noobies winning rounds and taking a big lot in the game. I have played RDR 2 poker so many times that there seemed to be a pattern in the algorithm of who usually gets the winning cards and losing cards.
The algorithm I noticed was bluffing. I knew how to get the pot up and when to bluff. It was effective about 60-90% of the time.