You may have been taught in school that democracy is an ideal system. But when you become an adult you learn the truth about it. It's not actually about getting the perfect person that everyone agrees with in power. Because that's impossible, people don't agree on anything.
Democracy is really about preventing the worst people from having power. You will never be voting for someone that you 100% agree with because that's impossible, no one agrees on everything. But it's your duty as a citizen to determine who is are the worst people on the ballot and determine which way to vote to either remove those people from power or prevent them from getting it. That's what democracy really is. Welcome to adulthood.