My one grip with Libertarianism isn't really with the ideology itself but many of the followers of said ideology. You see I have a problem with what Roderick Long calls "Left-Right Conflation-ism" and Kevin Carson calls "Vulgar Libertarianism".
An example of this would be how some view modern day "Corporations" who buy political power. Those institutions are not legitimate. Their wealth was made by way of utilizing means not accessible to any of us. They also tend to be safe from Market competition due to regulations they've purchased. Simply chalking it off as "well they did the best they could under the current conditions" does not cut it.
Their wealth ought to be stripped from them, as we do with bureaucrats and others Statists, the moment Freed Markets takes shape. They are enemies of Liberty and Freed Markets.
the ill gotten gains will leak out, I promise you. Only the strong survive.