There’s zero class consciousness in the US is the easiest answer. You can see even now as contradictions continue to mount still few people accept a Marxist view of why that is. Unionization rates are still in the toilet with little movement (although existing ones are being more active recently). There are effectively zero socialists (real socialism) in the US and due to complete alienation and indoctrination that is extremely unlikely to change until conditions become much much much worse here for workers.

I do not agree the US will be going anywhere anytime soon though. The decline could and I’d lean into “probably will” take decades if not centuries depending on variables we can’t predict the fallout from such as wars, climate change, etc. If this shithole was gonna split the time where that was possible came and went and those who wanted a split lost for now. They’ll keep trying of course, but things are still relatively very comfy in the US so people adopting radical ideologies (of any sort) is unlikely and demand from the ruling capitalist class for a split is also nearly non existent, and you obviously need class traitors (or opportunists at least) willing to undermine the institutions in an effective way that leads not to just more misery, as they’re doing, but workers actually, legitimately being desperate and seeing a real opening to force a change.