Just like democracy is not a good form of government, but simply the least terrible: If you go around on the street and ask people what and why they are voting for you get absolutely stupid answers, like "My parents voted for that party, so I do too.", "I have always voted for that party", "I always try to vote for the winning party". A SIGNIFICANT amount of people are easily swayed or misinformed, too, making control of the media essential if you want to secure your power (see Turkey, Russia, China) and social media dangerously important (say, Twitter were to require tweets of a certain like-count to be fact checked, then Trump would not have such an easy game). Still, there are no real world alternatives or well thought out concepts that are better or fairer than a democracy.