A system in where the means of production are privately owned and there are two classes. The private property owning class, and the class who has no private property and is forced to sell their labor to survive.
Sounds shitty right? But under communism, there's no financial restrictions to be able to do what you want and follow your dreams. And everyone gets what they need without anyone locking away someone else's needs. And people own their work instead of a wealthy elite.
Capitalism sounds sucky. And you base your definition of communism of the USSR, China, and North Korea. USSR was state capitalist. China isn't even communist (communism wouldn't have billionaires) and whatever goes on in North Korea is I don't even know but it's not communism. I would more describe North Korea as fascist.