@pavel put a rp2040 in between to make it appear as something sane
What does it even use the mouse part for?
@pavel how does it mess with the DE if it doesn't actually send the mouse events?
Depending on how the controller is used, you can just exclusively open the input device to make it not affect other software anymore. Or unbind the driver in the kernel and use libusb
@pavel ah that reminds me that I had a mouse a long time ago that required custom xorg config otherwise I clicked "through" windows in gnome because it had too many axes or something. Might be the same issue.