If you have signed an employment contract, then it's perfectly normal to be required to restrict your personal opinions when you are representing your employer.
This isn't some dystopian concept. This is how grownups behave. You are welcome to be an edgelord on your own time anonymously.
It is quite dystopian in general. We are in an early stages of a corporate dystopia all across the world. Very polite and grownup dystopia. For instance it only took 8 years for my employee to stop working with an aggressor country, responsible for killing tens of thousands in those 8 years. And they were both fulfilling contracts for customers from that country and employing contractors there. Neither me nor practically anyone else in the company could speak out against this (and like half of the contractors in the company were from the country being massacred). But we were definitely very polite and all grownup. Great for the business, yeah? :)
I'm not against capitalism, or pro some rebellion, or pro insulting people on twitter. But on the other hand I do realise that the corporate dystopia is only ever increases, because of of the immense power imbalance between individual humans and corporations.
"early stages of corporate dystopia". If anything, we're on the other side of it where companies are being held to some ridiculous standard that we don't even hold elected officials to. Remember Netflix having to fire Kevin Spacey for being accused of something that the president of the United States actually admitted to? How does this fit into the dystopian medium you think you live in?
I'm obviously not condoning abusive behaviour, I'm using this as an example of how much scrutiny there is on these corporations.
It's the same in this case: you're taking the view that a company should allow itself to be dragged into politics by the employee who publicly represents it. Surely that's wrong, isn't it? Companies should not be involved in politics. That's specifically what you are against when you call them dystopian.
This person, who I assume is an US citizen, is absolutely allowed to criticise the army, but they should do it as a citizen. Ultimately, the army serves the citizens and corporations serve customers.
Again - I'm not supporting this person in the OP, not supporting her insults and don't support doing this to customers in general. I'm also rather grateful to the US army and citizens enabling it, because they are #1 factor today why me and my family and friends are alive.
Regarding corporate dystopia, I politely disagree with you. Some isolated cases where corporations are a tiny little bit affected are a drop in ocean of the reverse situations. Also notice that in your example a person (Spacey) is unilaterally abused by the corporation, outside of any due process. This is actually an example for my idea, I think :) . And in general the trend is obvious - corporations are rapidly increasing in size, they destroy free market (or rather it works as expected) by demolishing any competition, bribe and subvert weak governments to push their agenda and lock all customers to their products/services. They blatantly exfiltrate money to the tax free offshores and avoid abiding by any laws (which matter). They deliberately stall any regulation by government of any new areas they are controlling (ads, ISP, media, communication and so on). They are like a rapidly growing tumor, for now mostly benign, but metastases has already started. And anti-monopoly government bodies of all countries are spectacularly impotent over past decades, sitting on their hand and doing nothing that matters.
This isn't some dystopian concept. This is how grownups behave. You are welcome to be an edgelord on your own time anonymously.