One of the definitions of insanity is doing the same thing repeatedly and expecting a different result.
Part of the problem was that Romeny didn't and doesn't really want the job. (Zero did, then, but apparently doesn't, now. It's interfering with his golf games and Kobe beef dinners too much.)
Romney would have more cred if he gave the William Tecumseh Sherman ("If nominated, I will not run; if elected, I will not serve.") reply instead of all these wussie denials of interest.
Personally, I think Romney would win this time around. I think people have seen the mistake they made and, as the polls showed, many regretted not voting for him last time. It would give people the chance to feel like they corrected their mistake.
Having said that, I like Cruz and hope he runs.