I thought the first half was awesome, I loved the way it was a satire. Ken discovering the patriarchy was hilarious while also making social points through humor at the same time.
The second half I thought it got too on-the-nose and straightforward and lost its nuance. And in the end the messaging was weird, since you'd think the message would be for equality (both the male-dominated and female-dominated societies had problems) but in the end they don't make a strong push for it with the joke about the females still dominating like the real world. I get they were probably trying to make a joke about how the real world isn't yet equal either but it fell a little flat for me since it sort of walks back the fact that the barbie society was also flawed in how it subjugated the men.