Thank you for a very clear, concise statement.
With a clear conscience, I can now say "I am against that". Why?
1. Those dictatorships aren't going to dissolve themselves. You're going to have to use force to do so (I hold out very little hope of legislation against corporations passing, or being declared constitutional if it did pass). You can create an armed revolution that can overthrow corporate interests, but what you get after that doesn't usually look like greater freedom. What it looks like is someone who was after power found a vehicle to get it, and after the dust settles, all the rules and structures that limit how they can exercise power are gone.
2. It's inconsistently in favor of freedom. "Renting yourself to a dictatorship is not freedom"? What if I want to? Should I not have the freedom to do so? (Why would I want that? In terms of my overall well-being, that may look like a net win to me. I may decide that not having to worry about controlling the direction of the business, while limiting my freedom at work, means more mental space to control things I'm more interested in.)
3. It's not very practical. There are people who, bluntly, are not fit to have much of a say in how a business is run. What are you going to do with them?
If you want people to voluntarily organize into employee-owned businesses or co-ops or whatever, I'm fine with that. If you want to advocate that employees should come to such enterprises, I'm fine with that. Argue that they'll get a better (and more fulfilling) deal there? Sure. But telling the rest of us that we can't (or shouldn't) do otherwise? That sounds rather dictatorial of you, frankly. (With you not necessarily meaning AndyNemmity, but whoever advocates the idea.)