Perhaps the main reason Americans have lost respect for democracy is that we don't have it. Political parties now represent a minority of Americans, and they get to choose the candidates. Which are sold to us by the rich people via corporate "news" media. I've read that six major corporations now control 90 percent of the mainstream news media. There are plenty of alternatives on the Internet -- Common Dreams is one of my favorites -- but I think most people still get their news, if they get any, from newspapers and TV. Which mix facts with a lot of interpretation and propaganda. 

I find that even so-called educated people with degrees know very little about political or social issues. They seem to focus mainly on their work and family, and don't care much about issues as long as they're comfortable. 

Then there is gerrymandering, etc. Politics has become unresponsive, people are frustrated, and pressure is building up. Danger ahead.