Hardly a majority. Trump won 3,141 counties and Hillary only won 57.
She received 3 million more votes? That humiliating in a country of 330 million people. That's less than 1 percent of 1 percent of the voting bloc. Not to mention that's a third of the size of Los Angeles County, and only 1 million more votes than Trump? In Los Angeles County? One of the most liberal counties in America? That says a lot about how people really felt about her. In the end, if the majority had voted for her, she'd be in office right now.
We do not live in a democracy. We live in a Representative Republic. Democracy means 50.1%, or "the majority rules." In a Represetative Republic, there are representatives for each district who are supposed to take their vote for their district to the government. That means each person's voice counts, not just the loudest, not just the most concentrated, but everybody's vote. That ensures that people who live in little towns are heard equally to the people who live in big cities. It is the most fair way to do it.
I would remind those who still complain about Hillary's loss and complain about wanting to change the Electoral College that one of their biggest complaints is disenfranchising the voter's voice. You can't have it both ways. You can't be for "not disenfranchising the voter's voice" and wanting to do away with the Electoral College at the same time. Getting rid of the EC would disenfranchise tens of millions of voters' voices, including their own down the line.