It's a shitty utopia thought up by a grumpy German philosopher from a bygone era where he thought that all the issues of Germany during the Industrial revolution could be solved by having all the resources, land, and means of production be publicly owned and operated as well as have the redistribution of them go from ability to need. He thought that this was the silver bullet solution to everything. He thought because there's a theoretical equality of outcome, there would no longer be class division tearing society apart. Therefore, there will no longer be crime or discrimination or a need for money or even a state... as that's the reason why these things exist in the first place. It should be noted that he thinks that the state would dismantle itself after the utopia is achieved just because, and it's not just the government but also the state apparatus so things like the military, public schools, the courts, the media, etc would also get dismantled.

So basically it's just a fantasy of anarchist society that doesn't have state, money, or classes where all the people magically agree and get together to publicly manage all the means of production and redistribute all the resources in such a way where everybody has exactly what they need all the time. Oh, and all of this will happen after a violent revolution that overthrows capitalism followed by a transitional tyrannical socialist state that supposed to represent the workers that's going to rule with an iron fist to bring about the necessary social conditions to realize communism. That's the state that will voluntarily dismantle itself when communism is achieved.

The ideology is such a fucking joke that it can't even withstand basic criticism and logical reasoning. It's no wonder that it has literally failed every single time it has been tried. Hundreds of attempts across different time periods, lands, cultures, and circumstances. At one point communist countries controlled over 1/3 of the planet... and yet they all failed. Every single one is a failure. They all either collapsed, turned into authoritarian shitholes, or reverted to capitalism in some way. The opposite never happened. Capitalism is not good, it's a very flawed system and idea, but at least it functions to some capacity. Marxist communism is so delusional and unsound that it literally doesn't function. No amount of "MUH THEEREES" will change the reality of communism being a meme.