Hey
There's a large thread with users trying to fix this (below), would be great if you could contribute so that everything is in one place, and it might just get MS's attention:
So far, the only solution seems to be to completely delete the Xbox app and all of it's redistributables and services, such as gameinput and gameservices. You can, however, keep any gamepass games installed and play them via a desktop shortcut even without the Xbox app. Far from ideal, but better than anything MS has offered up so far....
I uninstalled gameinput in the usual way through Windows "add or remove programmes", then removed all of the Xbox services through the powershell by following the relevant instructions at the following link:
Alternatively, some have found that this simple powershell command (run as administrator) does the job:
Get-AppxPackage *gamingservices* -allusers | remove-appxpackage -allusers
Hope that helps... and I hope MS pull their fingers out and try to fix this properly. It's ludicrous that this has been going on for so long.