For free... Only after you buy their (overpriced) proprietary hardware. Where could I download a copy of their OS, for free, to install on my non-Apple desktop? Okay now do you see why that isn't a fair comparison?
It's pretty fair. You pay money - you get a product. In Windows, you pay money - you get ads and tracking.
edit:
To make it clear to people not reading the comment carefully, I'm not saying MacOS is "free". I'm merely saying that once you pay for the computer, the OS is included in the price.
And there is no additional monetization under the form of ads or tracking. Unlike in the Windows world, where you pay for the license, yet you are still being tracked and served ads.
I'm not defending Windows here, but you buy an Apple computer, you get the computer and their software. You can't get either independently without paying for the other, but neither could be considered "free."
>it is fair competition because in both cases you paid money for the product
The comment you replied to was a response to calling MacOS free, and was entirely about that topic. It's not a fair comparison to call MacOS free, that isn't justifying Microsoft's actions though.
Off the top of my head, Windows has advertised or directly installed Edge (are you suuuuure you don't want to default it?), OneDrive (in file explorer, no less), Office 365, Bing (in the system search bar), Xbox something or other, Candy Crush, Teams, Skype, and probably several others that I'm forgetting.