I know a bit about Minerva. If I recall correctly, their focus wasn't on training entrepreneurship per se, but more on creating a virtual classroom environment built around shared learning spaces and gaining exposure to different cities (reminiscent of the Grand Tours that European nobles used to take), with professor interactions happening virtually.
As for whether it works, it's probably too soon to tell! You have to wait a few years to really see the impact of an educational model.
There are some programs out there that attempt to systematically train entrepreneurship in the classroom (disclaimer: my current venture falls into this category). Check out an organization called NFTE, they're a very big player in this space. I can make an introduction if you're looking to get involved with them somehow.
If you're concerned that your education hasn't enabled you to reach your potential... well, so was I, honestly. But you can't change the past, so the best thing to do is identify what was lacking and work on acquiring it - on the fly if you can - while pursuing your goals. You can't let what might have been hold you back. But you can use it in a very powerful way if it stokes your passion for what can work better in the existing model, as it did mine.