I have really bad stick drift on my Wii U game pad and I have tried everything to fix it but the up and down on the left joystick just keep drifting
Did you check the potentiometer for wear?
I think I have but I can’t remember
If there is stickdrift it is mostly a problem with a potentiometer. It could be dirt/hair/dust which prevent a correct reading or wear of the surface. My last ten controllers had more or less wear on the potentiometer which caused the stickdrifting. And I replaced the potentiometer on the specific analogstick.
If you are not used to soldering/microsoldering and don’t have the needed tools, I would advice to buy a replacement analogstick modul.