While this does a good job debunking the antiquated capitalist propaganda used to obscure broad democratic socialist success, all current forms of government are now unsustainable. That is because they are all based on capitalist economics that denies any option but unsustainable materialist growth.
In this world there are no citizens but only consumers ranked by their level of consumption. This is the failure of that system. Vast and wasteful consumption is celebrated and those who are kept poor are marked and reminded constantly that they are failures and must go heavily in debt to maintain their consumption.
In democratic socialist countries this is also true but the essence of community is retained to ensure that the no one falls into abject poverty or falls below the level of agreed well being. As is well known in economics, maintaining high universal level of well being creates stable, resilient, and democratic societies. Failure to guarantee basic well being produces fear, loathing, racist, and unstable societies are susceptible to fascist opportunists. See the US, Brazil, Great Britain, India, Russia as the largest problems.
Please do not waste time endlessly discussing failed 20th century ideologies. They are totally irrelevant to us in the age of continuous climate based crises and pandemic.