The spectacular performance of the US economy, 1800 to the present, relative to countries with varying levels of socialism. The poor performance of socialist industries in the US. The failure of any socialist/communal agricultural system to produce enough food to feed itself. (Even the Soviets gave up on collective farms.)
This isn’t a moral judgment. But a market propped up with strong tariffs is by definition not a free market. The American economy you’re lauding was a mixed economy.