America isn't in a great place. People have forgotten that there's a whole country between CA and NY, the two social hubs of America. Hundreds of millions of people who have seen America's industry die, people who don't make money from the internet, big business, or are in such unpopulous places that there's no large service sector.
America is currently in a total deficit of 19.5 trillion dollars, increasing by 550 billion a year, or a million dollars every minute. This rate has only been increasing since 2014, six years after the GFC (http://www.usgovernmentspending.com/spending_chart_1960_2021USb_XXs2li111mcn_G0f), with 2001 being the last year America made surplus.
People were shamed for supporting a man that has no motivation other than to restore his country to its prior power, rather than someone more concerned with how the world views America as a politically correct nation that helps everyone but themselves.
TL;DR: Hilary is a frail lizard humanoid on the verge of death, trump will kick ass.