Actually, no, now I'm going to pick on you. First, because you are actually getting political but you just denied to yourself what is obvious, and secondly because your view of the world is not more dark. What you've actually done is clearly delineated the bad guys, making opposition to those things good and making the problem solvable and opening up at least the potential for victory. What you should be looking at is how easily this analogy came into your head, and how easily it might fit with how you already look at the world. You're actually creating a world view for yourself filled with hope.
That's the nicest thing anybody on EN World has ever said about me.
I'm OK with failing to define a perfectly horrible world view for my self. I agree with Kirk. I don't believe in no-win scenarios.
Dark would go much further. It would suggest that not only are all those things exactly as you say that they are, but that all the opposition to those things are also being run by the demonic conspiracy for their own demonic ends. It would suggest that the whole of political strife exists solely to trick people into doing first one thing then another to further the interests of the demons. So for example, you were motivated to repeat anti-corporatist memes, not because the corporations are actually the good guys, but that a world in which even all that you said was true, if the corporations won and created that world it would be less dark and better than is actually intended. The goal isn't to create a world nearly as bright as is suggested by your post, but the worst of all possible worlds, having all the evils you postulate but none of the redeeming features of that world. That is, all that, but also a world with no privileged status to hope to obtain to, no wealth or comforts resulting from industry for anyone to share in, everyone always desiring to being gluttonous but having no food to indulge in, everyone always in a state of heightened lust, but lacking any object for that lust, and so forth. In the world you postulate, there is at least room for the villains to enjoy themselves. But the truly demonic desires not even the villainous to find any joy, hope, or comfort because even those are shreds of surviving good shining like little lights in the darkness.
True evil has been portrayed a couple of times in literature. Tolkien does it at several points. The world where Sauron triumphs is a world of misery for its own sake. In the book 1984, Orwell pretty well captures the notion of evil triumphant - misery exists for its own sake. There is no big brother, no ruling caste, no anyone who is profiting from the horror. Everyone is captured in it. It's not perfectly horrific and dark, several features of the book at the end suggest a horrific sort of happiness is possible even in the darkness and that the social order described ultimately collapses, but it comes reasonably close.
I probably didn't read enough into Tolkien to get the hopleless sense of hopelessness that Sauron was pushing. Orwell was much more obvious and to the point as the hopelessness was the current state of affairs, rather than projected.
Anyway, in your view, the state of affairs in a GrimDark setting is that Evil has won, and it Sucks for Everyone. Even Evil.
Hypothetically, Walking Dead does OK at this. Everything sucks. When you die, you join the suck. Everybody you like is going to eventually join the suck. If you make too much noise being happy right now, suck will come and ruin it.