That’s how communism always ends up. When you hand over majority of the power to the state, it won’t be keen on giving it back.
That’s like saying the US is not capitalist because we don’t have a true free market and better products/services don’t always rise to the top.
These simply aren’t things that can practically happen, just like the workers owning the means of production.
How did he break it? He basically just flipped the genders so Kens are the ruling/working class and Barbies are just subservient eye candy. Barbie just flipped it back. It’s a broken and unimaginably unfair world in either case.
When Kens ask just for a bit of equality at the end, they are shut down and given some unimportant appeasement as a joke.