Definitely a matter of personal taste if you ask me.
I found Microsoft very good in interfaces. Esp. on Xbox One actually and I really enjoy Windows 10. They are really streamlining everything on Windows 10 PC, Windows Phone 10 and Xbox One. I just really love it.
Also: Microsoft is the number one software company (and by far). If you includes Apple, Google, Amazon etc then you are talking about Information Technologies companies which is a different category. None of Apple, Amazon or Google are close to Microsoft in term of software production. I know this is not the point of your OP and I'm not arguing but just FYI :)
On a side note: the second largest software company in the world is... Oracle... And in term of user interface they are the worse on the planet, it is unbelievable how counter-intuitive their interfaces are. But again this is a personnal oppion at the end.







