Props on growing your business. Mine is also bootstrapped and doing well. Sorry that was your experience. They so seem to have particular types of businesses they are more interested in (though I don't know what that criteria is).
I'm a tech founder who is in Paris through a very similar program with Paris & Co, French Tech. If you have questions I'll loop back around to answer them based on my experience.
Note: I didn't come with the French Tech Ticket (which was a different program that was more structured). I have an existing software company which I am expanding to France & Europe.