Microsoft's entire business model for decades has been to shove shoddy products down people's throats. And somehow, they have figured out how to do it too, because otherwise Teams wouldn't be used by anyone.
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They've successfully indoctrinated whole generations to use Windows/Office. Here in Brazil using a computer was (probably still is) synonymous to using Windows/Office. Everyone had their pirated version of Windows and many don't even know that alternatives exist. When those people open companies they'll use what they know.
Software companies have to build for the most popular OSes and most can't justify anything else. Which then means most software only works on Windows and people can't leave it even if there are better alternatives (see Adobe). Finally, any non-closed computer comes with Windows so the cycle continues forever.