I accidentally bought an Xbox controller but luckily realized driver updates and so on would be an endless parade of bullshit while I was still within the return window. Unbelievable that they are getting away with such poor user experience.
Tho if you watch carefully on the xpadneo wiki, if you want to pair a xbox elite v2 controller with bluetooth you first need to pair it on windows with the same bluetooth card to be able to use it!
I use an Elite Series 2, if that's the same thing, and the one I'm currently using is the second one I bought because I broke the first. This one has never been paired to a Windows computer, I bought it after I switched to Linux, it paired normally and has just worked
Use a Windows 10 computer on the same Bluetooth adapter to pair with the controller. It must absolutly be on the same Bluetooth adapter, i.e. the same computer (can be inside a virtual machine with Bluetooth passthrough) if it’s an internal Bluetooth adapter, or the same Bluetooth dongle. Then, you can get the pairing keys and install them within your Linux Bluetooth system.