Let me help you Quest niggas out
>Have at least a 5ghz router doesn't have to be wifi 6
>Virtual Desktop recommends your PC be plugged in directly with ethernet 
>Try to be in the same room as your router
>Have decent internet service
OR
When I used my link cable I plug it straight into my graphics card and I don't use an adapter to put it into USB-A because it looks like shit for some reason and is the only time I have trouble using the link cable.
Oh and Virtual Desktop is a paid app you have to buy it on the Oculus Store
[spoiler]just buy an index desu[/spoiler]