As a matter of ethics.. they've lifted a billion humans out of back-breaking subsistence farming and have invaded zero countries in the last 30 years.
The lifting of millions of Chinese out of poverty has been one of the greatest humanitarian achievements in human history and shouldn't be understated, but it doesn't justify the human rights violations that are being committed by the CCP today.
This concern is a mirage of a geostrategic struggle.
We can never know for sure, but my belief is that if the other side had won the civil war, this would have happened several decades sooner
We in the west could have stopped screwing them over a couple centuries earlier as well. Might have avoided the whole civil war ever happening.
EDIT: Was being light-hearted about the "holding a grudge". Been a while since Mao is all.