Eh, that #3 could be a bit more in depth and shows the situation was a bit more complicated.

I doubt the USSR was ever that concerned with appearing hypocritical and was 100% worried about the risk of war. Considering even after several years more of preparation they lost 27 million people to the nazi invasion, with over half being citizens, that doesn't seem like an invalid concern by any measure.

It was pretty obvious via the appeasement and occasionally even open praise of fascist regimes that a potential European alliance with fascists against the USSR was possible. Furthermore the anarchists were not the only group involved in the united front that made up the Spanish Republicans. And while the anarchist controlled areas showed incredible promise in terms of improved productivity, as another commenter in this threat pointed out, there was a considerable lacking in a long term plan and in the support they would need to effectively defeat the foreign backed fascist threat.

The radical Friends of Durutti reflected, “We [the CNT] did not have a concrete programme. We had no idea where we were going. We had lyricism aplenty but when all is said and done we did not know what to do with our masses of workers or how to give effect to the popular effusion." Committed idealists were trapped between the necessary pragmatism that guided cooperation with other leftist groups and the desire to end social hierarchy and government. Though the Friends believed that they should have "leapt into the drivers' seat in the country, delivering a severe coup de grace to all that is outmoded and archaic," they lacked the power, organization, and popularity to wrestle control away from less revolutionary forces. - u-Comedicrat, down a bit in this thread

If the USSR were to throw its entire backing behind the anarchists, what would the liberals, soc dems, conservative antifascists etc who made up the rest of the popular front have done? What would the rest of Europe have done? Bourgeoisie leaders at the time praised fascism as "an antidote for communism", they clearly knew and didn't care about the massive amount of aid to the fascists from Italy and Germany. As much as we all would have loved to see a successful anarchist revolution and the red black alliance of our dreams, if this effort had happened it's possible that it would have started WWII a bit earlier and with some very unfortunate teams. As much as we can sympathize with the anarchists desire to proceed with the revolution, doing so in the middle of a civil war where your enemies are openly foreign backed and your allies are not on board would likely have turned out condemning the entire socialist movement to death in a worst case scenario.

I feel like the common online discussion of the Spanish Revolution and Civil War largely lacks the appropriate nuance and seeks to paint things in as black and white as possible when the reality is that it was a much more complicated situation both internally and internationally. And I get it, I read Homage to Catalonia and thought "well this is fucked up, why tf would the communists do this?" But the account of one international brigade member with no access to anymore info than what he encountered and his own ears and eyes is hardly definitive and there is no shortage of scholarship on this subject from all perspectives, anarchist, communist, liberal etc. Check out this Trotskyist source that blames both the anarchists and the Stalinists for the revolutions failure

Anyway I hope we can all look into this with a more open mind and more honest criticism. Painting this as something that is solely about stalinist betrayal covers up the errors on the anarchist side that must be learned from if anyone ever hopes to actually make anarchism a viable path to revolution. I'm not sure where you got points 1, 2 and half of 3 from, but it's pretty clear the USSRs one and only goal was to prevent the spread of fascism while doing everything it could to avoid a fascist-liberal coalition against themselves. And we can argue all day if it was the right course or if they botched the details (which I am absolutely in agreement with) but the reason itself for their behavior is not "shitty".