Well, until yesterday I'd say that the warden was an invisible artificial intelligence lacking a sense of humor and a bit of a chip on its shoulder from people breaking the rules, but now the warden's a tiny little robot who just staged a coup.
But everything else you said pretty much sums up what we've got here. And breaking the dome isn't your only problem. Trying to hack the system will probably get you either attacked by the people who happen to like the warden, or cause system wide shut down and we'll all freeze to death before the oxygen runs out.