I think you aren’t reading into it enough, like look at your analysis here: “this wasn’t even a successful feminist movie as they didn’t change anything in the “Real world”. It was just a feel good celebration of women and solidarity which didn’t actually do anything of consequence. That was the point?”
But consider that in the final scenes of the movie, an old lady shows Barbie a dream sequence of how good life could be if she entirely rejects the current system. Barbie then eagerly does so. The old lady represents Luxemburg, Barbie entering the real world represents revolution, Barbie becoming human represents the reunification with the human species being that is only possible under communism. This is a revolutionary communist movie.
The fact that the Kens win nothing but aesthetic changes by the end of the movie is a representation of the reality of third wave feminism and other types of reformism.
As a tank fetishist, I appreciate the representation.