Anarchism

Marxist approach is to create a vanguard of professional revolutionaries

I think you should say marxist-leninists specifically. Anti-authoritarian marxists are more aligned with anarchists in that regard: we're not opposed to a vanguard, but opposed to forming social hierarchies based on supposedly how "enlightened" you are. Just because you've read a few books and struggled for a few years does not make you more sensible or wise than the rest of the crowd: if anything, some fresh blood and critical feedback from outside the group can be instrumental in building widely-accepted/better policies.

This is a misinformed statement since there was no “ruling class” in USSR.

Maybe "class"/"caste" is the wrong wording, but in the USSR there was definitely a ruling group which held more privileges than the rest of the population. Fighting against privileges is precisely the reason i'm a communist. Whether this privileged status is inheritable by birth makes little difference to me.

Your views are held by a tiny minority of the people living in this world. Most people are not interested in your primitivist vision.

So first i'm not a primitivist in any way. I'm critical of technology as a tool of oppression, but i'm not anti-tech. I'm anti-civilization in the sense that i'm against empires dictating a doctrine and ruling over people. I believe a majority of people hold somewhat-anarchist views throughout the planet, although they're never given a voice, but they're convinced by the existing power structures that it's just a dream that cannot be realized and we need more "realistic" or "reasonable" approach (the trojan horse to reintroduce inequalities at all levels).

Zapatistas do not consider themselves anarchists, and dual power is certainly not exclusive to anarchism

They don't label themselves anarchists as a movement, sure (though some do individually), but the zapatistas uprising is arguably closer to anarchy than State Socialism: it's based on people's self-organization at the lowest levels with non-authoritative coordination, transformative justice instead of repression, and cooperatives to run the economy. Only the military arm (EZLN) is organized hierarchically, and that's precisely why that vanguard does not try/want to have political power over the communes (caracoles). The zapatistas movement is an inspiration for the anarchist movement worldwide; we don't cheer for Syriza/Biden/Boric coming to power because we understand such people/parties are not a path to human liberation.

Everybody on the left supports moving towards more freedom and equality.

Yet many people on the Left are willing to build a practical tyranny (without any freedom) in order to achieve equality. I'm precisely saying we should never trade one for the other, as only combining the two can produce any significant result. "Freedom without equality is rule of the strongest, Equality without freedom is tyranny" as a saying comes to mind. If we want to build more freedom and equality for all, we need to work in this direction and never let power-hungry tyrants let us believe that they're incompatible principles.

Even the worst lifestyles in US are subsidized by even more horrific exploitation in the colonies.

I'm aware of that. I was simply replying to your saying that in order to be an anarchist i must be disconnected from capitalist exploitation (old leninist doctrine against the "leftists"). Yet, there's a nuance to this argument which in my view is important: economic wealth does not equate quality of life. In some places you can live a decent life without a lot of money because there's communal production and solidarity. So yes here in the Global North there's social services and an abundance of trash off which you can survive (and still, that's only in the biggest cities) but walking from one distribution to the next is not exactly a decent life (next week is long term when you're homeless). Many people here in France don't have proper access to food, housing, medicine and education despite an abundance/waste of resources.

Marxists aren’t satisfied to simply build communes while allowing such horrors to continue. We want all workers across the world to be liberated from the yoke of capitalist exploitation.

And yet, how do you change the end game without a paradigm shift? Work and obedience, whether for a capitalist or "socialist" State has shown to produce only more exploitation.

things that may be abhorrent to you or me will always be appealing to a significant portion of the population. Hierarchies we see in our society arose many times throughout human history because they’re ultimately effective at preserving themselves and rooting out ideas that threaten them.

That's a good point! That's precisely because there are exploitative social structures in place that they can reproduce themselves in our minds so easily. Without national schools and media to indoctrinate everyone, reproduction would arguably be more difficult. That's why preventing hierarchies from emerging in the first place is key to social liberation.

It’s pretty clear that federalist efforts that anarchists advocate are not sufficient to challenge such organization.

I'm not sure that's true, or at least i'm not sure a top-down "socialist" structure is more adapted. Take for example the Spanish revolution: all in all, the anarcho-communist revolution was going pretty well given the circumstances, and it took a lot of efforts to tear down the revolution:

• Hitler/Mussolini supporting Franco with weapons
• "social democracies" staying neutral because they didn't want to anger those 3
• the communist party sabotaging the revolution from within with military support from USSR: attacking (with weapons) workers self-organization like at the Telefonica, dismantling by force the people's militias...

In this case, as in many others, trying to be more "organized" (read hierarchically-organized) than the opponent is precisely what brought down the revolution. By reproducing the structures and tactics of your opponent, you're turning into your opponent. (I'm not saying some level of secrecy and non-consensual action is bad for "vanguard" action: i'm saying it's bad as a social structure).

there is nothing stopping this sort of organization reforming because there is no central authority to keep it in check

I don't think you need centralized powers to prevent reaction. If you actually build communism (freedom and equality for all) you destroy the material conditions in which such movements can thrive in the first place. If everybody's well-fed and housed, how are the fascists going to convince that only a stronger fist and repression against some segment of the population (whether it's the judeo-bolsheviks, the islamo-leftists, the anarchists or the queers) can help them out?

I mean if some people want to build a capitalist commune with bosses and landlords, good for them i guess. Soon they'll realize nobody wants to live that life and work for them. It's funny how in libertarian (ancap) doctrine everybody wants precarious workers, yet none of these people actually picture themselves being the lowly worker :)