Human society's categorization of Capitalism as "natural" is probably the reason most responsible for keeping us back from a better world. When you do that, greed is no longer considered a vice but a virtue.
If not, please explain your "way forward" that solves the problems that capitalism doesn't while still retaining the same incentives that appeal to basic human psychology. I'm sincerely interested.
I think the person you replied to was opting for evaluating these and other systems in a different light. Judging by your extreme overreaction, I think you missed this important point.
Edit to add: Also, as feedback, the degree of sincerity you claim to have of your interest is undermined by the rest of your response. It would not surprise me if no one took the risk to have a more productive conversation, so please do not take silence as validation.