Synthaxx

Either something is wrong with your setup, or your hardware. Make sure that you’re running the right drivers and that you aren’t accidentally running on your onboard graphics instead of your dedicated GPU.
Check the general Linux gaming boards, and doublecheck by installing Steam and loading up something heavier from your library if you have any.

Having just finished a DRM unencumbered version of Returnal by the excellent “LinuxRulez!” (linux repacks with all the trimmings) i can tell you that what you’re experiencing isn’t normal.

Love mine as well. Works perfectly in linux with freesync, and i’ve used it to finish off a lot of my Steam backlog.
And 120hz at 5120x1440 will stress even the most beastly cards, so didn’t feel like having to go for an even higher refresh rate one.
Protip, putting the taskbar on the left/right side makes sure you don’t waste a lot of pixels.

Let’s try not to use gendered language.
“Landbastard” is the preferred designation.