I'm assuming.you're just ignorant of Makhno, and not intentionally spouting century old propaganda but here. From the article "Makhno's anarchism, however, was not confined to verbal propaganda, important though this was to win new adherents. On the contrary, Makhno was a man of action who, even while occupied with military campaigns, sought to put his anarchist theories into practice. His first act on entering a town -- after throwing open the prisons -- was to dispel any impression that he had come to introduce a new form of political rule. Announcements were posted informing the inhabitants that they were now free to organize their lives as they saw fit, that his Insurgent Army would not "dictate to them or order them to do anything." Free speech, press, and assembly were proclaimed, although Makhno would not countenance organizations that sought to impose political authority, and he accordingly dissolved the Bolshevik revolutionary committees, instructing their members to "take up some honest trade.'" Does that sound like a bandit king?

The USSR absolutely betrayed the Spanish Anarchists, this isn't controversial at all. Here's a well sourced thread from someone who wrote a research paper on the topic breaking it down.

I don't know enough about Hungary to have an opinion on the matter and can't be bothered to do all the reading for it right now. Based on your characterizations of previous libertarian left movements I'm going to assume you're full of shit though.

Hard agree on "left unity". Authoritarians and libertarians shouldn't waste their time on trying to get along, it's counter productive.

Further reading/listening for anyone interested:

The State is Counter Revolutionary is a theory and history series covering the Russian and Chinese revolutions. The Maoist one may be of particular interest to you.

Alexander Berkman, The Bolshevik Myth

Murray Bookchin, The Spanish Anarchists

Maurice Brinton, The Bolsheviks and Workers' Control