... is an example in support of GP's point.

Great for professionally administered servers or expert power users. Not for much else. Until recently, esoteric use-cases like playing audio were catastrophically unsolved. And then those got better around when screen sharing, accessibility devices, and remote-assistance tools all broke because of another OSS schism. Installing and running an ordinary program requires choosing among a handful of ways of doing that (container systems, package managers) even on the same distro. And then if a graphical program wants to do crazy stuff like "open a file", well, the permissioning situation is "fragmented" to put it generously.

Gaming? Gaming works great on Linux now! ...because a corporation with centralized planning, KPIs, and incentives spent hundreds of millions of dollars on it.

I like Linux. It's been my daily driver for years, on and off. I use it for a living, I use it for a hobby. But that doesn't mean it's not a perfect example of every single one of the OSS flaws that GP listed.