Looks like a market with healthy competitiveness to me.
Looks like Amazon is not bothered by a so called "dominance in the on-premises business as well as Office 365 and Windows" to "tie Azure and the rest of the cloud services together and make it difficult for customers to have free choice,".
Now compare those share above to the share of the play store vs other store within the Android ecosystem and you would have "dominance" that tie customers and "make it difficult for customers to have free choice"
I maybe wrong but to me Google is just salty they're about to loose the context that enabled their Play Store to be dominant and virtually unchallenged and that a company like MS is set to benefits from this