Insofar as the proletariat is invested in the system, you must use that system.

This is just bowing to sponteneity. The party's role is to raise the consciousness of the proletariat to their level, not to remain where the working classes are at. That's the purpose of political parties, to organize and create proletarian intellectuals as a counter to bourgeois intellectuals. Otherwise the proletariat stays at the level of trade union consciousness if it has no means to see the political struggle as a whole.

Stop dragging Lenin through the mud to justify supporting imperialists. Lenin's point was never to just follow along with whatever is popular among the proletariat without analyzing if it's achievable or not, it was to raise them to correct praxis.

Want to uphold Lenin? Start with an analysis of class, what's the class makeup of the US Empire? Largely labor aristocrats, whose spoils have been eroding for decades. The petite bourgeoisie is solidly in the MAGA camp, and big tech capitalists have merged with the big finance capitalists as imperialism is decaying. The people are largely disillusioned in the electoral process. Settler-colonialism is still a primary contradiction internally.

What is to be done? Build up a party like PSL, that upholds indigenous rights and is trying to unite the proletariat at the front lines of every major struggle, both domestic and anti-imperialist.

This is word salad