History Lesson

My most pressing question for Karl Marx’s theory is how does one make this system work? History has given three prime examples of the despotic rule that never shifted over: Mao’s China, Lenin and Stalin’s USSR, and Castro’s Cuba. Each situation has seen a complete inequality between the ruling despotic body and the common people. There has only ever been one true Marxist with power, Che Guevara, but he had no desire to run a country. Mankind has been unable to so far create equality between its ruling party and common citizens. This leads me to believe that perhaps a despotic parent to slap the country in line is not the best way to run the government, which turns back to question how this system is to be ruled? It was brought up in class that perhaps a purely democratic system of governing would work but that is impossible based on the pure size of a country. Not only would having the huge majority vote on every single action the ruling system makes would be absurd; nothing would ever get done and it is irresponsible to have those who know nothing about economics vote on the technicalities economic plan; but the majority is not always the most intelligent person to listen to. In 2003, the vast majority of Americans thought it was a good idea to go to war with Iraq, yet looking back this was a poor choice. Even literally every Senator but one voted that we should enter Iraq, the debate was over when. That one who voted against it is now president. Sometimes the view of an insightful few can be far wiser than the emotional temperance of the majority. So if pure democracy is not the answer either, what is? That is my first question to Marx.
My next involves motivation of the common worker, which Marx can make a greater case for even though I am still not entirely convinced. What is to motivate the worker to do the less desirable jobs? If the government will require everyone to share this job in shifts from time to time, would that not completely diminish the efficiency of these respective fields? Also, if people are required to do this mass amount of menial labor, presumably the amount of boring and tedious jobs outnumbers the unbridled passions a man has in life. Therefore, if a man found himself devoting 80% of his time to menial jobs and only 20% to his passion, is that not the same situation we are in inside capitalism? How would Marx avoid this? Not to mention the very narrow spectrum of passions the vast majority of people have. Mostly people want to be actors or athletes or writers, sure there will be a small minority of people whose passion is scrubbing toilets but they will be far outnumbered by the majority of the former. Perhaps I am a pessimist but I can just not see this form of government not falling apart or the masses losing morale within the system. Personally I have read Marx many times, studied the Bolshevik Revolution numerous times and am a huge Che Guevara fan, but each time I can just not see this form of government working. My conditioning may just make me so, or perhaps I am greedy, but I just cannot see it working.