Chosen Solution

umm hello, my controller stick seems to be pushed into the incasing of the controller. The stick doesn’t move around that greatly as the stick’s rubber thumb grip rubs against the case. Can’t seem to find anyone else with this issue on the internet. Could anyone help out?

Well, if that is the case you may want to replace the joystick. iFixit provides a guide on how to do that, and you may want to upload some images of what it looks like inside of the controller so we can deem if your controller is reusable or not. Nintendo GameCube Joystick Replacement Adding Images to an Existing Question