I don’t know much about the man but I found this

He has described himself as a “libertarian Marxist”.[46]

https://en.wikipedia.org/wiki/Yanis_Varoufakis

Libertarian Marxism is a broad scope of economic and political philosophies that emphasize the anti-authoritarian and libertarian aspects of Marxism.[211] Early currents of libertarian Marxism such as left communism[212] emerged in opposition to Marxism–Leninism.[213] Libertarian Marxism is often critical of reformist positions such as those held by social democrats.[214]

https://en.wikipedia.org/wiki/List_of_communist_ideologies#Libertarian_Marxism