Yet the more people the better, our world now works in such a way that we have multiple people working to produce one product, like for cars we have engineers workers, people who do electronics, programs design and so on, in a way that the impossible work for one man is divided between several people which lets everyone do his job much better.

You are trying to simplify it too much. That is why it doesn't work. You can pick examples for as long as you want and you'll barely be scratching the surface of all of the variables out there. It is not humanly possible for us to centrally plan for these complexities.

The only thing we've found that does this without needing central planning is a mechanism of universal exchange. It is a brilliant and simple tool that we call money, currency, etc.

It is not the problem. Human nature is the problem.

So you either need to realize currency will remain (thus no central planner really needed), or you need to come up with SOMETHING that can accomplish the same tasks it does equally or better.

I haven't actually been able to come up with any such thing. Cryptocurrencies and blockchain may be a step in the right direction, but those are but evolution of the currency concept and are still currency.

The problem with the anti-capitalist people is they think that correlation equals causation. It does not.

The presence of this tool and people doing voluntary exchange among each other with this currency is ultimately what defines capitalism.

Extra baggage can be added onto that and people still call it capitalism. Yet in reality it is capitalism + extras.

It is the EXTRAS where the actual problem lies.

The causation actually is largely in the field of human nature. That human nature doesn't suddenly dry up and go away if currency is removed from the picture.

So the entire communist, and Marxist ideas base their entire reason for existence upon false causation, and false equivalencies.

It sounds good, and emotionally feels good so it must be true, right? Wrong!

Socialism I consider the stepping stone towards Communism and Marxism but it hasn't completely decoupled itself from currency.

I don't know of any "communist/marxist" nations that remove currency completely. So I cannot find historical precedent for that. You could likely find hippy communes or other communal nations where they did.

The largest historical actual communist society I am aware of is the city state operated by Pythagoras. There are some amusing sayings from the world at the time that group of people was active. It seemed to work pretty well during the age of Pythagoras when there were far fewer factors/variables to keep track of and while he was alive. It did not long survive his death.

The needs and variables of the time were limited in scope by a vast amount compared today and it had a particularly brilliant mind that could centrally plan that.