You seem to be conflating open source and functionality. The proprietary Nvidia drivers are perfectly functional and maintain feature parity across Windows and

You seem to be conflating open source and functionality. The proprietary Nvidia drivers are perfectly functional and maintain feature parity across Windows and Linux (minus HDR but that's not Nvidia's fault as HDR barely exists on Linux). AMD drivers are open source but that alone doesn't make them "work better" than the Nvidia drivers.