I dont really know anything about Greek politics, so I cant answer that. But from what I heard, they arent very successful overall.
Well class and ideology are completely independent concepts. You can have someone in the bourgeoisie who is communist (like Engels), or someone in the proletariat who supports capitalism (like most of the working class in the first world). So for Anarchists it also depends on their material conditions, from what I see most online, of them live in western countries, and are not affected that much by oppression.
My opinion is that they are genuinely against capitalism and fascism, and as such are already better than socdems or demsocs. But their lack of understanding of class and materialism will prevent them from implementing a dictatorship of the proletariat, which means they will never gain any permanent success. And they even stand against actual socialist states, siding with capitalists at the worst.
But in the end it all depends on material conditions, and the good thing is that anarchism is a first step for many people into Marxism-Leninism.
I use openpirate for torrents (hope its okay to post links here). Regarding VPN it depends on your country, afaik you can use torrents without VPN in most countries without any problems. But if you dont want to do that, I would recommend getting a seedbox (basically a server that downloads and seeds the torrent for you, its usually way faster than VPN, and not more expensive).