His cabinet picks aren't very inspiring.
In a system like that, where you are not going to be appointing career politicians (good), then I guess you are indeed mostly left with selecting people from business and the military.
Clearly, there are some very capable, individually very successful people in his cabinet, but under a billionaire, celebrity president, I would have thought, if not expected, that his cabinet might at least be a token effort to be more representative of the people they will be governing.
That is a problem in all western democracies to be fair. Trumps cabinet resembles that of Putin, a mixture of military hardmen and uber-wealthy businessmen, who couldn't comprehend the difficulties in getting/paying a mortgage, or sending their kids to college, at any level.
He could have tried to make room for a few people from the charitable sector, academia, or with a record of community/grassroots activism, although the latter would probably sound too much like Obama. Not to mention more women and ethnic minorities.
The US President has the opportunity to do that, unlike the parliamentary democracies, full of equally objectionable carrer politician cabinet secretaries.