This is yet another example of one of the most common pro-Kremlin disinformation narratives - the "Evil West" - according to which alleged Western imperialism and meddling around the world is presented as the most malicious and destructive force in the world. Specifically, it follows the recurring pro-Kremlin tendency to demonise the United States, grossly misrepresenting historical facts in the process.
While it is true that the US has a controversial human rights record and is currently seeing declining performance on human rights protections, it is misleading to say that the US has no concern for human rights. The US continues to score highly on freedom indicators, political rights, and civil liberties. The Constitution of the United States - the foundational document of American democracy - enshrines a number of inalienable human rights, including freedom of speech, freedom of assembly, freedom of religion, the right to keep and bear arms, freedom from cruel and unusual punishment, and the right to a fair trial by jury. Additional human rights have been recognised in amendments to the Constitution, as well as acts by Congress.
No evidence is given to support the claim the US human rights violations exceed those of of Stalin and Hitler. Both the Soviet Union under Stalin and Nazi Germany under Hitler committed crimes against humanity and were responsible for the mass murder of civilians: according to the estimate of historians, like Timothy Snyder, the number of victims of repressions under Stalin accounts for 20 million plus deaths and under Hitler for approximately 11 million.
For further disinformation cases claiming that the West regularly violates human rights and international law, or exploits human rights standards for its own agenda, see here, here, and here.