It's an oversimplification to highlight the main point: workers' relationship to the means of production. In capitalism, capital owners own the means of production. In socialism, the workers own the means of production.
IME most Americans not only don't know what socialism is (despite being opposed to it), they don't know what capitalism is either (despite supporting it).
> Now, our current implementation of Capitalism is clearly wreaking havoc on our environment.
It's doing an awful lot more than that. It's pillaging the Global South. It's impoverishing us under the massive weight of housing, medical and student debt. And it's quite literally killing people. People decry the failures of the USSR, for example, but 9 million people die of starvation every year. Why isn't this attributed as a failure of capitalism in the same way?