Not who you originally asked, but I am aware of an example where Windows is still better than Linux for a specific game: Guild Wars 2. Not because of anything directly in the game, but there is an insanely useful overlay program called BlishHUD that runs as a separate process. On Windows it just works; on Linux it is a pain to get it to mostly work.
But overall things have clearly shifted from gaming on Linux being a joke, to being possible but a huge pain, to being ok-ish but a bit clumsy, to finally being sometimes even better and on average equal. There will always be differences, and Windows currently still has the benefit of being the default. Maybe that too will change one day.
It is unreasonable to expect a state to allow each and every citizen to pick and chose which program to use when communicating with them even if just a single person is involved. As soon as multiple people are supposed to all be in the same virtual room it is effectively impossible.
So what happened here is that the state changed which program(s) it "forces" you to use. Do you have a more specific point about why domestic options are supposed to be worse for that than the ones from U.S. Big Tech companies? Because if not, you don't have a point at all.