But this is the classic Linux user mentality; Linux shouldn’t get easier, users should get smarter.
If computers can be easier to use then why should people instead sacrifice loads of time learning how to operate them? Most people have other things to be getting on with.
Can’t really add anything regarding linking the Steam libraries as I just removed all my games from Windows and downloaded them in Linux instead. I used ProtonUp for managing my Proton versions and I started up Cyberpunk using ProtonGE 13, and it runs the same as it does in Windows. I’ve got the GOG version and I’m using Heroic Launcher but I don’t think that’ll make a difference.
Have you got anything to work using that linked library? Maybe try just installing it locally.