There's a self-serving aspect of Libertarianism where we dismantle the government so we can build our own government out of corporations with zero accountability to any of the people they govern. A kind of modern feudalism. And a lot of people in this camp envision themselves the count or duke or king or whatever in this feudalism, when in reality we'll likely all end up renting everything we own from the 6 people who own all the companies in the world. There seems to be a motte and bailey where the motte is "oh we should just remove all the governmental controls and let private enterprise flourish!" and then the bailey is "don't you see how little freedom you have from government" when it's made apparent what private enterprise has done in the modern world.
You seem to be describing our current corrupt democracy that produces crony capitalism that gives favors to big businesses and enables the business owners to become one of the 6 people that own everything.
A major point of libertarianism is to tear down the government structure that enables that crony capitalism and restores real competition in the market.