You mean fair, not free. The only way to avoid the tyranny of the powerful is regulation restricting their freedom to abuse their powers.
THAT’S what the government is supposed to do to a market: help the small to regular sized fish and cooperation between them by, amongst other things, erecting fences keeping off the sharks that would otherwise immediately eat them.
Also stuff with plants, I guess, but this ocean analogy is probably long and complicated enough already 😂