Capitalism has been very popular in the United States for a simple reason; it was profitable. Not just to businessmen, but to everyone. So long as it kept reducing income disparities, and making each generation better off than the last, it enjoyed great support. Now, for whatever reasons, it's failing to do that. And public support is falling as a result.
Go figure. The answer isn't a clever ad campaign to make us like that failure. The answer is to do whatever it takes to return American capitalism to the way it was a couple of generations ago. Or eventually, people will get fed up and abandon it.
Short of military coup by the few who are doing better than almost everyone else, those are the choices.