Hi Miro, sorry it took me so long to reply.
I tried recording it, but the video looks buttery smooth (Steam VR view) while in my HMD the game is janky as hell, so it wouldn't really be helpful. However I made this screenshot from the recording.
I'm using a 2060 and a i5-10400, with an Index (settings in the image above).
Now, I know my PC isn't the best and can't handle max resolution and 144 on many games. But trust me, this is not normal. I've never seen the GPU and CPU like that. It's skipping SO MANY FRAMES!
I dont really know tech so I can't tell you what's the problem. But hopefully the screenshot helps. I would love to test the game again if you ever come up with a possible solution!