People create these platforms and transpose the real world in, they could come up with more equal systems, but they choose to create an olygarchy.

People are the real world. So put a bunch of humans together, you are going to replicate conditions that you see elsewhere. You are up against human nature. That is the reason the way the world is. Utopia is a world for ideal humans. None of us are ideal, therefore, we do not live in an ideal world.