“not fucking up the environment” and “not creating wealthy elites” are descriptions of outcomes, not descriptions of political/economic systems like democracy, capitalism, monarchy, or Marxism.

So given that you want to achieve these outcomes, what political/economic system do you think would better help us achieve them? What system of governing people and economic product do you think would help us better preserve the environment and avoid wealthy elites?

For example, Marxism suggests a transitional phase of “dictatorship of the proletariat” that might align with things you’ve said. However it is exactly that, transitional. Historical examples of this we’ve seen such as Cuba, Vietnam, and China have transitioned to some form of market economics and with that, re-emergence of wealthy elites.