I had written a more thorough response, but the app crashed and I lost it. Sorry of this one sounds a bit harsh, I do mostly agree with you, I just think that the examples you’ve chosen are bad because they’re either distro specific (so not a Linux problem but a problem with that distro), or not Linux problems (i.e. there’s nothing Linux can do about it because the problem doesn’t lie on Linux but elsewhere)
Using proprietary multimedia codecs (Fedora)
Distro specific. It should be just like installing anything else, and it is for some distros, certainty for the ones I’ve been using.
Installing Nvidia drivers that have the capability of auto-updating (any distro that doesn’t have a GUI for driver downloads)
Distro specific, I’ve had NVIDIA drivers auto-updating for the past 15 years or so, long before Windows had that same capabilities. And it updates with my regular system update, no need to use any special GUI for it.
Installation (most people simply use the pre-installed OS and never reinstall or install anything new)
Not Linux problem. Also, while I can see the argument that’s easier to use what’s already installed, that tells you nothing of how easy one thing is in comparison to the other. If computers came with the most convolutedly complex and unusable crap of an OS, full of bloatware and spyware pre-installed people would still use it. Not to mention that the Linux installation process was much easier than Windows for the longest time (until windows finally implemented automatic driver installation)
Game compatibility (Linux gaming is great, but there are still major titles not supported)
Not Linux problem. Although this is something to bear in mind while choosing your OS, it’s the companies that make games that are at fault here, there’s nothing Linux can do to remedy this situation, so it’s unfair to judge it for it. That’s like saying Windows is harder to use because running docker containers in it is impossible without some virtualisation, while this is something to consider when deciding what OS will you use to self-host, it’s not per-se a reason why Windows is more difficult to use.
Accessing firmware settings and profiles for laptops while booted (like Armoury Crate for Asus laptops (yes, I know about rog-control-center and asusctl, but those don’t work for all devices, and are harder to set up))
Same as above.
Like I said, I agree with lots of what you said, and some of those are thing to keep in mind when choosing an OS, but those are not good arguments as for which OS is simpler than the other. The Linux way to do most of them is using the package manager, and that’s much simpler than searching the internet for the correct download.