They are not concerned with success because they do not believe that success is even POSSIBLE. But they ARE worried that the "liberal lamestream media" might trick people into believing that it is working. And in any case, no matter how successful the ACA might eventually become, no matter how popular it is, these people will never hear about it. They exist in an alternative reality bubble. And while that alternative reality is fraying as it clashes ever more with reality, and an ever increasing number are escaping, those who remain inside have become even more fanatical and demented -- a cycle that will only continue.
They hate Obamacare and Obama and Liberals for the same reason the Germans in the 1930s hated the Jews -- that's what they were told to hate. They are given a new list of reasons to justify that hate every single day. Every day Rush and Fox report on a new outrage, and the liberal lame-stream media never touches these fictional stories (thus tightening the cognitive dissonance noose). Think of them as religious fanatics (which many of them are); no facts or logic can scratch the armor of their faith, and any such attempt only makes their faith stronger.
Consider, we are talking here about people who actually believe that Sarah Palin is smart and well informed -- and in any case Jesus will tell her what to do. That's how indoctrinated these people are. There is literally nothing, no matter how ludicrous and preposterous, that the core will not accept.