Is it? A simple boolean choice and you give total carte blanche to anybody got elected?
I think a good chunk of the voters cast their choice assuming that there would be checks and balances.
Sure there are also many, many trump voters who really wanted exactly this. But they are not the majority of the people.
A winner takes it all system, where some votes are worth much more depending on where you live, isn't a very democratic system.
It may be an acceptable compromise if the two alternative options weren't so extremely unpopular with the other side. That's why the checks and balances are required.