I agree with everything you said except for the window manager comment. i3/sway puts MacOS and Windows to shame. I could get used to my work macbook if only it would let me move focus in more than one dimension (i.e. super+left/right/up/down instead of cmd+tab back in time).
MacOS is especially bad because they don't even try to address their deficiencies. They just bandaid over it with an app ecosystem and then don't give that ecosystem an API that's to sufficient to do the job (e.g. the limitations of amethyst and amphetamine re: focus control and lid closing).
100% this. I'm using a Windows notebook at work, and I cannot go for a single week without running into some random window management bug. Despite it being the origin of its name, Windows is actually really bad at windows stuff.
And that's before we get into intentionally missing features like focus-on-hover.
1. Every once in a while, when I move a browser tab into a new window, the window spawns entirely off screen. At least that's what I think. It's completely invisible, but I can focus it and bring up the Alt-Space menu, which shows up in a random screen corner. I can start moving it, but it never moves into view. I just cannot get a hold of it. Only fix is to close the window and try to get back to the open webpage manually. It feels like this happens most often with Youtube tabs where a video is playing.
2. I have FancyZones set up (using PowerToys, i.e. an official MS tool). When a window is snapped to one of these zones, and I minimize it and bring it up again, there is a chance that it has a baffling white border around it that sticks with it while resizing. Only fix is to maximize the window, then snap it back into the zone.
3. Something that I've seen from time to time with different applications (when it's with my browser, it may be related to 1, but it happens with e.g. notepad too): There is a chance that new windows open up in just the most baffling geometries. For example, Notepad opening up at ~6000px width, stretching across most of my two screens' combined width. Or, particularly irritating, browser windows coming up at what must be ~10000px width and height, with the top way above the top edge of either screen, so I can only use Alt-Space -> Maximize to grab a hold of it.
4. Windows spawning on one screen, but using DPI ratio of the other screen, so either cartoonishly small or cartoonishly large. The one that comes to mind the most is the Outlook calendar reminder popup, but I think I've seen other apps suffering from this too.
I'm not sure about whether it's supported on Windows (and why if it's not), but I think it refers to having whichever window the cursor is over being "active" by default. For example, if you have two windows open that both have a text input focused (like maybe a text editor and a browser), the more common window-management paradigm is to consider one of them "active" independent of the cursor. If the text editor is active, you need to "switch" to the browser to type into it (by clicking on it, alt-tabbing, closing the editor, etc.). An alternative way of doing things would be to have the text you type go into whichever window the cursor is over. I haven't tried out using this, but I do find this behavior noticeable when playing a game on one monitor and having a web browser open on the other. Often if something is loading, I'll switch over to the browser to read hacker news or something while waiting, but then when the game is finished loading and I switch over, I'll try to move or something and be momentarily baffled at the lack of movement until I realize that I just typed "w" or something into the browser.
MacOS is especially bad because they don't even try to address their deficiencies. They just bandaid over it with an app ecosystem and then don't give that ecosystem an API that's to sufficient to do the job (e.g. the limitations of amethyst and amphetamine re: focus control and lid closing).