Agreed and it's frustrating that people don't admit this.
I recently started dual booting Linux again and tried both Arch and CachyOS. Former with Hyprland, the latter with Gnome just to see how well the games run. I knew going in that tiling window managers don't behave well with games and that was indeed the case. With Gnome, even some native games made by Valve had terrible performance issues where I have none on Windows. There are also cases, and I wouldn't even describe them as edge cases, that you have to tinker to get things to work properly.
I have a very basic dual monitor setup, but yesterday I spent an hour trying to fix a problem where my cursor would escape the game's window into the second monitor. The obvious solutions (gamescope) didn't work for some reason. Did I end up fixing it? Yes. But that's only because I know my way around Linux. That's an hour I'm never getting back.
I'm not making an argument for Windows, I very much dislike using it but Linux folks need to accept reality. A reality which isn't fair, but reality nonetheless. That's when you start to make progress. (Which, to be fair, they have. Tremendously so. But there's still a long road ahead!)