How is it low res when the specs say 5120 × 2560?
So the actual number of pixels used to display the pane containing your text is maybe 10-20% of the headset display's resolution.
I suppose you could display text directly on the headset display. But then you only have 2,560x2,560 pixels per eye, fewer pixels than a 4k display.
Edit: fell for their lies, the headset is only 2k per eye. The 5k figure is "combined", i.e. a marketing number.
I'm with you though: early headsets were low resolution but these modern ones are not. We can still use more pixels though, esp. for text work.