Mergers like this are always bad for the consumer

Microsoft's acquisitions of Github and LinkedIn both worked out pretty well.

Github actually has more free features now than it did before the Microsoft acquisition - they made some paid features free (like the ability to have private repos) and added a lot of new free features (like Github Actions which is built on Azure), without removing or paywalling any existing free features. Github likely wouldn't have been able to afford that investment without Microsoft.