[2022] Having trouble with setting up second controller

Have you tried turning on or off XInput in the main menu settings?

Well that's definitely not better :(

Can you tell me more about that second controller?

Also, here is a list of supported controllers for MageQuit:
https://guavaman.com/projects/rewired/docs/SupportedControllers.html

Maybe the list can point you to a driver or something that needs to be installed?