Showcase (+ Helpwanted) Unity Desktop: uDesktopDuplication + Oculus Quest 2 (+videolink)

As you can see in the video I have to get quite close to the Screens to be able to read the text. I don't know what causes this flickering but when I get back to the normal distance then all the text gets constantly cut into parts. I don't know a better way to describe it.
Probably I just messed up some settings in Unity but I try to make this small program for me now for at least 2 months and I just can't find a solution.
I know that it should be possible to read the text at that size because I can read it in Virtual Desktop (but that only support 1 monitor, and I can't modify the world how I would like it.)
So if ANYONE has ANY ideas, please tell me.
I'm quite desperate because I think it would be really cool but I can't get it to work.
I even tried to render my full HD monitors at 4k with DSR