If spread, can subvert capitalist institutes as happened multiple times throughout history. In Greece anarchists are clashing with the state for decades

I dont know if Greece isnt a proper example. Despite doing some good work and having greater numbers per capita compared to other countries anarchist clashes and spaces in Greece have neither spread nor subverted any capitalist institutions to any meaningful degree .Their movement and their spaces and projects arent viewed positively by even 0.5% of the Greek population by this point and for decades plus now. Didnt get any boost from the complete colapse of the economy and institutions and at almost any aspect of political organizing and action they are often matched or outpaced in scale or success by combinations of secondary communist and socialist parties , the youth wing of one of the most ossified ML parties on the planet and let alone the party itself . Especialy in Unionism/syndicalism and in anything oustide the 2 Major cities (Athina, Thessaloniki) they are close to nonexistant. They were in the forefront of leftist anti-status quo dissent in the mid to late 90s a but that was mostly a result of the communist movement emerging in the mid-late 70s from 30+ years of state killings, purges,exiles and illegal status comparable to Latam or eastasian nations, having an OK decade and then meeting both the fall of the ussr and a couple of horrible decisions . But anarchists never politicaly capitalized on that beyond solidifying a hold on preexisting enclaves and in niche music and art scenes because of rampant anti-organizationalism beyond street clashes at the time and propaganda of the deed dumbasses everywhere giving a chance for public opinion to rapidly turn against them . I have a lot of friends and even relatives that went through that period both both in the anacrhist and communist left and a lot that still organize in various places