I think the chief complaint from Doom and Gloom (whose name actually begs the question of intent) revolves around the false assumption that government plays no role in a free market. Free market isn't simply lack of gov't control. It's a diminished role of any centralized power, businesses included. The anti-trust laws he mentions as being needed to curb this, ironically, are at the cornerstone of nearly any free market advocate.
His other point seems to be that a free market could never happen (in the US) given its current state. That is actually quite true, as many steps would bee needed to make the transition, and it would take decades, at the least. But it isn't criticism of the philosophy itself.
The operative idea is still freedom. As much as possible while still retaining enough centralized power to ensure basic protections and rights. I often wonder at the vehement attacks against free markets from the same "good Americans" who love the idea of freedom like it's the soul-mate mistress of an entire nation. This isn't everyone, granted, but it seems the forest is lost for the trees occasionally when assessing it as a philosophy. And it makes me sad when people dismiss it casually without actually researching its effects and possible merits.