It sounds like you have an interesting anecdote to share.

If you can just give us the anecdote rather than making a vague, sweeping critique of MS OSS projects, you might avoid the downvotes.

I've had this experience when I've tried to contribute to ASP.NET Core and .NET Core - in the case of ASP.NET Core, they weren't in the slightest bit interested in fixing something that's obviously broken. In the case of .NET Core, it was made clear that adding something new to the encryption library was going to take a long time, possibly years, even though there was demand for it.

I've given up on both :/

<off-topic>I committed to a Microsoft open source project and worked with (ex-)Microsoft people. The experience was great :)</off-topic>