Those are some difficult questions for sure. I don't know if humans are capable of creating a perfect governing system. Or that we are capable of being governed on a country level.
There is soooo much to take into consideration that my mind just reels from the enormity of even fathoming how to make something work. Even the question "should we improve upon or start anew," is loaded.
Our system is definitely buried in bureaucratic nonsense, but simplifying may not be the answer either. Simplifying will probably undoubtedly mean centralizing which is certainly a bad thing with our current leaders. The bureaucratic process was probably much more workable when the country was smaller. The same can probably be said for democracy. I think we need a new system of governance; something we haven't thought of before. I think we just outgrew our founding government.
Machines are the answer! Machines I say!