If you can, expand those stack views so that we can see a bit better what you have going on.
But before you do that try doing a vertical stack view which will have 4 rows for cards, Deal Button, Player Labels, and the Score. apply the constraints to the stack view so that it’s 0 all around.
Then in the top stack put a horizontal stack view in there which will be for your cards. apply constraints to that stack view. Then put your cards in there. see if that works for you.
And FWIW - I suck at constraints. So take everything I said with a grain of salt.