I must disagree. Reaction and revision in the party were consequences of Western actions taken against them.

I think this is terribly mistaken. Reaction is inherent in any society undergoing change. It’s not something imposed from the outside. There IS international reaction, but that reaction is based on the international community’s relationship to the change. Kruschev represented the reactionary forces within Russia, not Western reactionaries. Revisionism in the USSR had nothing to do with the West and everything to do with the reactionary elements within the USSR that wanted to make socialism compatible with enterprise for profit and individual enrichment. It’s completely naive to assume that all of the USSR was ideologically aligned and that the only reason the USSR went the way it did was because of the West.

It wasn’t some internal failure of the USSR that caused it to collapse

It absolutely was.

it was the Cold War and Western aggression

The Cold War was the way that the US created pressures on the USSR without engaging them in nation-state war. The USSR needed to manage these pressures, and they failed to do so. The counter-revolutionaries within the USSR outmaneuvered the revolutionaries, and Stalin had no one to pass the torch to when he died. Kruschev launched the anti-Stalin campaign and from that point forward there was an attempt to build a new world power that allowed for private wealth accumulation and would compete with the West on economic and hard power grounds instead of ideological ones.

Back then, the West was actually a formidable colonial power - they weren’t just managers, it was a shrewd and effective system of colonial conquest.

It still is. The problem isn’t that the USA got soft from it’s success. It’s that there’s no other empires to inherit from. The USA finished taking over for the others empires after WW2. That doesn’t exist anymore. So the empire has been trying to figure out what to do, but there’s no room to expand into anymore. This is the contradiction of achieving unipolarity through displacement - once you achieve it, you cannot maintain with displacement, and the only solution is for you yourself to be displaced by the next empire. The USA has been trying to figure out a new strategy for decades, and the blowback strategy (War on Terror) has been the most effective and promising it’s come up with. You can call them soft for not coming up with an answer, but there’s also the possibility that there is no answer to be found.

Yes, the West lost battles before, but today they can’t even present a unified front

I don’t think this is a mistake. The apparent divisions politically are really useful rhetorically. You can easily see this because there’s clearly continuity in the USA’s behavior, despite the appearances of lacking a united front. The way the USA prosecuted the proxy war in Ukraine is identical to how to it prosecuted other proxy wars, but this time they did while putting out an image of division. The image and the reality don’t match up. The reality belies the continuity and consistency. The only conclusion to be drawn, then, is that the image is artifice.

Now other colonial actors and capital interests act in defiance of the empire to make their own rogue moves for power

What other colonial actors and capital interests are acting in defiance of empire? The international bourgeoisie is firmly in control of the empire. There are no wars between billionaires. And just to pre-empt the obvious - Russia and China are not colonial powers.

Brexit, for example

How is this defying empire? The UK participated in a project to create a European economic union and then backed out to protect some of its interests. In no way is this a defiance of empire.

I think this shows internal divisions within the empire and that this is reflected in partisanship.

It shows contradictions within the logic of empire, not division within the empire. The partisanship is the current strategy of the owning class to manage those contradictions to avoid revolutionary conditions.

The material base has changed and this has changed the political superstructure

The political superstructure hasn’t changed at all towards polarization and partisanship. The superstructure changes that have happened have been about power projection through treaties and NGOs. The much larger superstructural changes have been the rise of BRICS, alternate currency trades, and the neutering of sanctions, all against empire.

the voters didn’t just choose to become partisan on their own

They were manipulated into it through the propaganda arm of empire. The empire chose to make them extremely partisan. It serves the interests of empire.

the voters’ partisanship is actually a reflection of the changing material interests of the ruling class coming into contradiction with each other.

You haven’t shown any subgroups of the ruling class being in contradiction with each other. You keep pointing to the partisan divide, but they all party together, they send their kids to the same schools, they live in the same neighborhoods, they get donations from the same corporations, they vote together for everything the empire actually needs to survive. The Ds fucking obviated the filibuster last year to raise the debt ceiling, FFS. You’re getting confused by the image of conflict. There’s no real conflict within the ruling class. The contradiction is between the ruling class and the working class, and that contradiction is getting harder and harder to manage due to the changing material reality, which is itself a contradiction in that the bourgeoisie needed these changes to material reality for their own interests but the changes are making it harder to manage the class basis of society. The partisanship is yet another attempt to divide the working class against itself and defuse revolutionary potential. Is this going to result in some actual politicians reifying the narrative and living in a fantasy land? Yes. But that’s not terribly important, and in fact, it would be really hard to tell the difference between someone who’s a true believer and someone who’s merely behaving in accordance with the conditions created by polarizing the working class.