To briefly share, the idea of Marxist revolution came about after the birth of the new capitalist system. Capitalist system being the market-driven economic system. Before capitalism, people lived in the era of Feudalism where the living conditions were hard. Only a small group of people managed to live good life by suppressing the majority 'peasants'. This lead to the revolution of Market-driven economic system which was thought as the saviour which can bring people out of their misery of being enslave.
A large part of this system was written in 'Wealth of Nations' a book by Adam Smith. So at first, people thought capitalism can save them from the iron grip of feudalism. But Marx and Engel thought differently. They see capitalism as a new sign of oppression in a different way compared to Feudalism. Kings, barons were replaced by another line-up of oppressor who took opportunity of the new system to enslave the mass. People didn't have to work for the kings anymore but they had to 'cash in' their labour force, their sweats and energies in order to live. Everything is profit-driven. Production goes mass until it overcome the need. The market keeps expanding but the question is, to what extend? Marx said capitalism is a system that can only hold until a time before it exploded.
Therefore Marx suggested the idea of Communism and Proletarian Dictatorship which were largely misinterpreted. If we come across the word communist and dictatorship, we will think of the cruelty and mass killing in history. We will think of Stalin, communist in Malaya and etc. Whereares, Marx and Engels ideas are different. They believe that power to be in the hands of workers, the mass or as they call it, the proletariats. They said having someone to decide for the fate of the mass (current existing system of democracy) is not democracy at all.
However to criticise the approach of Marxists, I would say that Marx and Engel did not offer solid foundation of Proletarian Dictatorship type of administration. By saying that people take charge and have the power, we can ask few questions that are oftenly failed to be answered clearly by the Marxists. What kind of power? Who's in charge? What kind of governance is proletarian dictatorship?
Marxists also said they believe in equal opportunity for all. Not that I don't. But to be realistic, the idea of equal opportunity is very idealistic in a sense that it is impossible to be realized. At least not until humans learn to not be selfish and put others first before ourselves.
To add to the counter-arguments towards Marxism, I believe Communism and Proletarian Dictatorship lacks competition. If people get paid similarly. No extra effort is needed to better oneself. Hence we will lack healthy competition. Without healthy competition, motivation is killed. Therefore, what is the need to sacrifice our time to studying medicine for at least 6 years if what we get is the same as those who don't even put their effort to better themselves?
Lastly, it is believed human in nature is egoistic, selfish and individualistic, at least to some extent. With all these characteristics of humans, communism and proletarian dictatorship are impossible to be achieved as to achieve them, we will need a collectivist approach. And collectivist approach is often doomed by the existence of egosim, selfishness and individualism.
To conclude, from the interesting discussion we had. I personally believed what we need in the system now is for Marxist and Socialist to fight and find ways to improvise Capitalism until the time where Capitalism and Socialism can co-exist side by side. It is proven now that we can't have a 100% capitalist system but we can never have a 100 socialism system too. Therefore what we need is a collaboration between the two so that by compromising, we can reach to a conclusion where a new and refresh market system is born.
*Note: The discussion is done not from a religious point of view.