I am really sorry this happened to you. On the scale of Microsoft, or even on the scale of what they're putting into this effort, it would have cost approximately nothing to give you an "acquisition" you would have been happy with. If the job didn't work out, they could have given you a fat consulting contract for a year or two. Or they just could have written you a check.
And it would have cost them actual nothing to just treat you with respect. Say how much they loved your work. Credit you publicly as a leader and an inspiration. Arrange a smooth transition for your users.
For what it's worth, I'm glad for you that the job didn't happen. Much better to be far away from people like this.