My 5700XT 1080p settings Solid 30fps with highest fidelity

Hmm, somehow this isn’t working for me. I’m on a 1440p screen.
I activated Virtual Super Resolution in the driver menu (Is there anything else to set?).
But as soon as I activate any resolution in game > my native resolution (tried all) and drop down the render scaling, text and everything becomes all jaggy and unclear.
Anything I’m missing here?