Aha, so only "TRUE" capitalism can be critiqued.

Okay, I will not condemn communism, I will however condemn whatever China and Russia (and others) are doing which they call communism, while not granting most of their workers any rights let alone common ownership of the means of production or abandoning money, private property or social classes.

To your imperialism argument I quote Lenin:

Imperialism, the Highest Stage of Capitalism

And even if you differentiate between imperialism and capitalism... How is the US massacre problem imperialism? How is the "war on drugs"/the opioid crisis/whatever the US does with their healthcare-system? How do you explain the constant need for growth in spite of a worsening climate?