Rounders has a young Matt Damon and Edward Norton and is entirely about gamblers making their living as poker players in the late 90’s or early 2000’s.
It’s pretty good
Edit: I just realized you said not entirely about cards, but I still highly recommend the movie. The plot revolves around cards, but it’s also about ambition and knowing when to cut off deadbeat friends
And his lack of any sort of moral compass beyond “money”