I'm using my Switch pro controller to play on the PC version, since the ABXY buttons are in different places, what the buttons do don't match the actual Switch version of the game. A is select and B is back like normal, but Y is Discard (and Next Round in shop), and X is Play hand (and reroll in shop) where it should be the other way around. Those are the correct buttons for other controllers, but its the wrong way around for a switch controller, and has caused so many discards when I meant to play hand and vice versa. It would be nice for there to be the ability to remap those buttons so they are correct, or even possibly there could even just be a "Switch controller" mode that swaps the function of those buttons, similar to how there is the "Play/Discard" or "Discard/Play" option to swap the place of those buttons. (That option does not swap the function of the X and Y buttons)
#Switch controllers are mapped incorrectly on PC, allow for button remapping or "switch mode"
chilly frigate
low lintel
FYI, I believe that this is an issue with the version of SDL that Balatro uses.
As a temporary fix, if you're willing to mod the game, you can crack open gamecontrollerdb.txt find the button mappings for switch controllers, ,then swap the face button values.
Here is the relevant issue: https://github.com/libsdl-org/SDL/issues/3967