Capitalism has never been a good system at any point in human history. Mixed economies have always produced better results. The capitalist system widens the class divide within society. One group keeps getting richer while another keeps getting poorer. In the end, the system eliminates the middle class and causes a wealthy minority to rule over a poor majority. Capitalism has never been the ideal system described in books, because of human nature it never will be.
Capitalism isn't good but the same can be said about communism. In communism, since everything was owned by the government, no one really cared about anything and everyone was stealing because it was on the government and not private property. This created a huge deficit in the country, and the corruption was at its highest.
The good thing about capitalism is that it's good at the start because there is competition among businesses and it naturally benefits everyone but over time, capitalism is terrible because the rich get richer and the poor get poorer.
If we compare communism to capitalism in my country, I would say that communism was better but that's because we were part of the Soviet Union and we were basically robbing Russia. If we were alone, then communism would be terrible in my country compared to capitalism.