Looking at others reviews, I'm surprised by the negative reviews that paint Barbie as simple feminist propaganda...which it obviously wasn't.
To me, more than anything, the movie was about complexity itself -- the complexity of Barbie as a toy, the complexity of feminism, and by extension, the complexity of human life.
If anything, I thought the movie did an incredible job of highlighting the COSTS of an oversimplified feminism -- one in which men become mere accessories with no identity or power. The disenfranchised Ken, who lives nowhere, and is never included, is not a desirable outcome of a feminist world.
Barbie becomes queen of Barbie land not because women should rule the world, but because that's just who Barbie is as a toy. Her apology to Ken, and encouragement that that he also know himself -- seems like the movie's final say on the patriarchy/feminism tension. It doesn't take one side or another. It shows them both to have costs.
In all, I loved that the movie found a way to show Mattel's perspective, while poking endless fun at all its failures. I walked away with greater sympathy and respect for the brand for allowing itself to be shown to be the complex thing that it is.