Are you proposing that we have found a perfect, ideal form of government with no flaws? Because I have never said that.
People are flawed and every form of government will have flaws because people run them. If you are suggesting socialism is perfect and not flawed, it is this exact form of thinking that is so dangerous that leads to communism.
Yes, democracy led to Donald Trump. Thankfully it only lasted for 4 years. So while still flawed, I would propose it is the best form of government we've found to date, and his time in office was minimized.
Extremism on either side is the problem. You seem to only think extremism on the right is an issue.