I think private sector dominance is greatly exaggerated by people opposed to libertarianism. Without the governmental sectors to create untouchables, like in the case with Amazon, Apple, Google, Facebook, and varying other monopolies you can think of, there would be little to no room for single corporations to dominate. But, lets just say for arguments sake we couldn't entirely eliminate the monopolized control over our markets, how exactly would that be worse then governmental tyranny? Mark Zuckerberg, Jeff Bezos, and Tim Cook haven't ever told me to pay taxes, what I can and cant put in my body, threatened to take my guns, etc. I guess it all boils down to whether or not you think public sector is worse than private sectors. To me it's obvious which one is worse.