Where did this meme of "capitalism requires infinite growth, therefore it's impossible and bad" come from? Capitalism doesn't require infinite growth, the universe has basically infinite resources, modernity which is largely but not exclusively caused by capitalism has allowed us to do so much more with fewer resources than generations previous, and as societies get richer in material wealth they produce fewer children and have the luxury to pay attention to things like the environment and their impact on it.

so... capitalism doesn't exist in a world with infinite growth potential. fiat currencies do and when tied in with capitalism, "infinite growth" is a goal. nuance is hard but not too difficult

Ok. With what do we replace it?

Limitless growth because competition and technology are supposed to grow with it. It worked really well till big tech showed up and gained a monopoly on everything

Economic output doesn't have a 1:1 relationship with the planet's resources. Many countries grow by offering services as opposed to goods. Not all goods have the same negative externalities in terms of harming the planet.