What the poster is proposing about cracking down on large powerful companies isn't even particularly troublesome Constitutionally in the US; but even then, as with any other sort of regulations, Constitutional restrictions on what the legitimate government can and can't do can be taken too far, or can get outdated.
Since I have you, what do you consider communism?
To start with, nationalizing mass media and the press.
> Literally created by venture capitalists to promote capitalism and further capitalists' aims.
Capitalism and communism go hand in hand. If you don't believe me, read the communistic manifesto. Marx writes again and again that they need capitalism first before they can introduce communism. The ideologies are not each other's opposite.