I'm about to drop out of a computer science PhD. What's next?

28 years old, signed up for a PhD without meeting the advisor first, as it turns out he is in absolutely no state to take on a PhD student due to his personal situation. It became impossible to switch supervisors and for two years I talked myself into staying the course. I'm about to be one of those stories of a PhD dropout with nothing to show for it. Dang.

So now what? I have an MSc in math and a great girlfriend. I'd love to not do data science, but that seems to leave finance as the main way to use my education. Curious to hear people's thoughts?