My Windows games run at higher frame rates at 4k under Linux (Proton) than on Windows natively. I only had to set up the scaling once - just like I had to with Mac OS for the same monitor. Linux display issues are greatly exaggerated, IMO.
I was gonna say "Linux... what?" I have the least issues with any hardware on Linux compared to other systems. Monitors are no exception. And if something doesn't work out of the box, you have options, rather than just being SOL with other systems.