the picture is essentially claiming “communism, a supposedly purely hypothetical system of governing/economics has never done anything bad” which ok so? By the same logic it’s never done anything good either, because it’s allegedly never really been implemented. It’s comparing real life to ideals/fiction.

You're ALMOST getting it.

The point isn't that communism is great. It's that the communist threat that capitalist demagogues love to bandy about is purely hypothetical, unlike the very real and present harms of capitalism.

To add to this I'm pretty sure the early capitalist thinkers like Locke didn't aim for the late stage capitalism society that America had become. If we are comparing ideology that's what we should compare with but if we are comparing actual real life scenarios communism is stuck with Soviet, China and Cuba.

Oh, I can point to a historical example of communism. Australia. Australia has 60,000 years of classless, stateless, moneyless history. And it was great!