"You can not express anything but opinions. And you shall not tell if they are empirical or not."
Uh, hahah.. Yes, the only thing one can do is express own's own opinion, what a bummer. You are welcome to describe your empirical experiences with the game.

"You only get hospitality from the staff if you praise the game like a happy child."
I am friendly to all. People who break the Rules will hear from me, but I do try my best to be respectful and polite, unless the tone has already been changed by them.

"Your complaints are encouraged to be added to a common "discontentment dump".
The Vent thread is for inspecific ranty type posts. Specific issue discussion are not moved there.

"You are encouraged to submit tickets to the game staff, instead."
Absolutely since they can tabulate input and we cannot. Basically your "vote" has weight there since there is a record of it.

"However you can not describe your experience with the customer service."
True, this isn't the place for that.

"You must remain silent about the fact there's no human support."
Now that is just mean to the people who work there.

"You can not tell how things work if you learn how they work."
Not sure what you mean there.

"Your threads get arbitrarily deleted or merged if they are seen as inconvenient (anything that does not say good things about the game, specially if they are real.)"
It is NOT arbitrary, threads get moved to appropriate Sections, and Rule breaking ones are closed or removed.

"You have no right to defend yourself. There's not even a section to reach the staff.
You can not know who are the admins, mods, if they are payed to work here, who decides what, who comes and goes. You can not make questions about the staff at all."
It's in Quick Links: Show Groups - Top Eleven Forum

"And occasionally if you get an administrator online, he'll happily reply to your message, but next day you'll notice he disabled his Private Messages, so that you can not catch him again."
Sxrenity covered this.

What's this "Forum" then?
This: " The Top Eleven Forums are a place for positive and constructive interactions between people that play Top Eleven or that have an interest in Top Eleven."

"Can we shed this oppressive aura for one day and have a moment of frontal clarity about its purpose?"
Poetic but ambiguous to me.