I can't exactly take communism too seriously as an ideaology to pick up in this day and age simply because Marx's ideal soceity was simply done as a direct response to extreme capitalism, which was rampant during his time (the industrial revolution). Child labor, massive unregulated working conditions, terrible pay, etc. EVERY country basically treated industry like China. And keep in mind this was before the age of globalization, so generally the goods you produced in your country were exclusive to your country.
Marx's communism was a critique of this. He predicted that and endless cycle of depressions and recessions would happen in capitalist societies, causing more supply than demand since the working class is exploited for their wages and therefore cannot buy the goods that fuel the economy (which they were at the time in some ways), which causes more depressions until the conditions are so poor that a "worker's revolution" takes place, and a capitalist society becomes a communist society.
This never happened. Capitalism didn't fall at the height of the industrial revolution. Nevermind the issue that Marx's ideology focuses too much on the working class and "production of goods" versus anything else (there's not much support for creative fields, science/technology, etc in communism, since it's highest appeal is twoards labor). Capitalism has never seen communist uprisings - in fact the only areas where it happened, were in feudal countries where the governing bodies were weak.
Lenin tried to explain this by stating that Imperialism caused capitalist socieites to give themselves a "barrier" between failure because they could open up new markets in colonies, have extremely cheap labor in colonies, etc.
But we've since left the age of Imperialism and capitalism still hasn't failed. Instead, the next step in society was globalization, something that wasn't possible in "communism's time", and in my opinion is why Communism and Marxism as ideaologies are only relevant to gain understanding into the historical situation of the time they were concepted. I'd be willing to bet that if marx was alive during the age of globalization, there would be no communist manifesto. Ironically enough, the only countries that still operate in the conditions that Marx was trying to fight against and prevent are ones that have adopted "psudo-communism", like China. Yes, I know, China isn't real communism. But it's kind of funny how the only countries on earth anymore that have working conditions like in the industrial revolution that inspired Marx to write what he did are all countries that have adopted governments inspired by Marx's ideologies. Certainly not Marx's fault, no. But it's pretty obvious that Capitalism wasn't the direct cause and root of all that injustice that Marx critiqued.