I don’t think those are inherently opposed, the whole point of libertarianism being about liberty. Power gained through free market principles is no different than any other power, and thus can and should be opposed through competing ideas/services. If I don’t like your service being provided, I or anyone should be free to provide a competing service that matches my needs/values.

Being a libertarian doesn’t require keeping Fountainhead as your Bible and worshipping at the feet of oligarchs instead of politicians/the State, and I would argue selling your soul to the company store is as antithetical to liberty as selling your soul to a centralized State. But as you’ve indirectly mentioned, there is a rather huge spectrum under the libertarian umbrella.

I won’t speak for other libertarians, as I know there are those that think do worship the oligarchy, and many of my views do probably put me on the left side of libertarianism. If I didn’t believe that government has a role is keeping free markets free and providing stability and peace for liberty to exist (most fiscally conservatively paid for by collapsing all social safety nets into an actual UBI requiring miniscule overhead, Universal Healthcare, and more Georgist tax codes), I’d probably be closer to the anarcho-capitalists maybe? Maybe some offshoot or flavor of Minarchist?