Do you understand what GDP is? It is the standard way that economic health and performance is measured. It includes:

“all private and public consumption, government outlays, investments and exports minus imports that occur within a defined territory. Put simply, GDP is a broad measurement of a nation’s overall economic activity.” — Investopedia

The graphs compare GDP growth rate between China and the U.S., the former of which you used as an example of a failed socialist nation. But their economic growth rate has been higher than the growth rate of the U.S. in every single year of the comparison range, since 1990. To state the obvious, a higher growth rate is better than a low growth rate — China’s economy is growing faster than the U.S.’s which makes its performance more successful; not less. That is what solid evidence means — to use metrics that even ideologically opposed economists would agree on as standard indices to make a meaningful comparison. Your opinion is yours to have, but it is not sufficient to stand as evidence.