The OS is not a joke since it can do some stuff better than either Windows or Linux can but I completely agree that there are some serious limitations or omissions that should have been fixed.

I think they don't because they have an incentive to not do so: they get a cut on all the software you have to purchase on the App Store to make up for it. It might not look like a lot, but if a large portions of Mac users need to buy a 5-10 bucks app to fix the windows management problems, it becomes serious money at 15-30% cut on millions of purchases...

And this is precisely the problem with Apple today. They are not honest enough to fix or improve the stuff they sell at a very high price, both because they sell it anyway and because they put in place many incentives for themselves to not do so.

There is the running meme of the iPad calculator but macOS could also use some care on the calculator/grapher not having received serious attention in decades. At the price they sell their stuff that would seem like a given, but considering they'll make money on the apps you buy to improve that situation, they'll never do so.

After using Apple App Stores for so many years, I wish I didn't, the convenience really isn't worth the cost down the road...