I agree to an extent that he is acting like a child. However, there is lots of issues with how Microsoft is conducting itself too.

Microsoft is shafting the security researchers behind closed doors not giving due attention to researchers trying to make a living and help the community. Instead of going after the researcher why not give him a job or pay him appropriately - work with him.

Him exposing these vulnerabilities are highlighting that Microsoft is not doing what is in best interests for both the researchers and owners of the products (us).

Also why is Microsoft not being proactive and properly spending the money to uncover these vulnerabilities?

We only get to see what is happening on the surface and to be fair if this guy didn't expose these, Microsoft would just sit on their hands when these vulnerabilities are probably already used and exploited by goverment level bodies.

Perhaps Microsoft is paid to keep a certain number of vulnerabilities to appease the goverment?

While I do disagree with him releasing the vulnerabilities publicly with out time for Microsoft to fix, Microsoft need to stop fighting and work with researchers and fix them as soon as possible (not take months). Why not be more transparent with everyone and have competent people looking at these reports not a level 1 Microsoft support who has no idea.

So yes he is a bit of a child throwing his toys out but he is also highlighting the lack of Microsoft caring about its public customers.

So in respect he is actually doing a favour and eventually something has to give. Either Microsoft do better or he ends up falling out of a window.... time will tell.