Keep in mind that Trump is also 25 years older than Cruz and Rubio with massive real world accomplishments. That is a massive competitive edge.
Well it took him 60+ years to figure out that liberalism is wrong, so he's not all that quick (Oh, thank you donald, for helping Harry Reid and Nancy Pelosi --/crit and sarc). And being CEO of a corporation is not the same as being executive of a political entity. You can't just tell people my way or the highway, it's a different animal.