It sure is weird since chatGPT is not as advanced as me yet. It also doesn't like communism. Sadly bots are made by the very same corporations I have issues with.

Compartmentalising the impacts of a mode of production in a society is usually how we get into a bind on trying to tackle problems that arise from them. They are not just "who owns what" but also dictate how humanity and society produces and therefore reproduces. Large urban factories were not a possibility nor desirable under feudalism or North American indigenous collectivism. When one says that "capitalism is the root of the problem" it means that the climate crisis we are living now is a clear consequence of our society's organisation over production.

So here's some examples to illustrate. Due to the arbitrary concept of "private property" inherent to capitalism, lithium mines in the Lithium Triangle can be owned by foreign corporations. That means that despite those mines directly affecting the lives of the local communities (which includes most workers there), they are kept there and protected by world governments no matter how much they protest. That is an anti-democractic use of the local resources that can't easily happen under either communism, anarchism or collectivism and yet is the norm under global capitalism.

Another example is the production of sugar, which relies on both work conditions akin to slavery but also constant burning of the plant that wrecks the local ecology. Populations who work producing sugar cane (in particular slaves) have revolted against that in favour of self-sustainable agriculture since sugar monocultures have been a thing, and yet they have had little power to change that economy without also locally abolishing capitalism. These often come with foreign invasions, as was the case of Haiti.

And finally in the case of the Paris Accords, the big majority of Unitedsadians supported staying in it, and yet the USA left it either way. The people who will suffer and die due to ecological crises of any scale are usually the workers and not the owners. That means that if the workers are in charge of production rather than the owners, it is easy to see how they'll be more willing to change that production to prevent harm to themselves, even if you ascribe to individualism as a natural human trait.

There is absolutely a need to bring capitalism into this, and even more its birth in colonialism and descent into imperialism. There can be no "accountability of the bourgeoisie" if we live in a dictatorship of this same bourgeoisie. The slave masters didn't bend over backwards to help the slaves, and the kings have routinely sent levies en masse to their deaths. We shouldn't expect any different from our current rulers. One obvious example of a communist ("anti-capitalist" if you object to that label) nation that has done the most to combat climate change is the PRC. On the other hand the übercapitalist United States is historically the worst at that. This is not coincidence.

And on the matter of "human nature". As I've pointed out before and that you've not acknowledged, many natural human societies parallel to European and settler ones have long pushed back against this backwards pseudoscientific notion. In order to make any universal rules for whatever domain you'd need to have complete information about it. However not a single person knows all known history, and all known history doesn't even include all actual history. It is typical of those who know little history to make bold proclamations about how "humans have always been a certain way" against humans that are a different way right before one's own eyes.

Your position seems to have softened to say that the issue is "selfish people controlling corporations", but that assumes that corporations themselves are universal concepts. Either way, the existence of selfish people doesn't automatically imply that all modes of production and equally vulnerable to it, and liberal capitalism in itself exists on the principle that all people should focus on self-interest and selfishness. It is no surprise that a system that was developed to effectively colonise a land, genocide its people, exploit workers and extract every local resource only for short-term profit will end up doing just that.

If you yourself don't have any solution and yet feel your opinion is relevant you are the one engaging in contrarianism. The very least you can do is read (and by that I mean actually read in depth) of those who actually have ideas. The Red Deal link is meant only as an introduction for something which I assume is from your country, feel free to develop your understanding further in whichever direction you want. Even if you come up with a solution under capitalism, it'll be a start. Just don't come back with no solutions while complaining that others' solutions are not good enough.