Pretty sure it's just that Windows is horribly broken, privacy-invading, ad-ridden malware disguised as an operating system. I swear it seems like nobody at Microsoft not even once have asked the actual users for what they would like to see in the OS.
Actual users are less important to Microsoft than execs who actually purchase the licenses.
That's an issue I would like to see legislated! In fact, in my country there is a law that prohibits bundled purchases: it's just that the authorities are not tech savvy enough to see it when it pertains to computers and Windows.