To show that I'm not bashing the movie just to bash it, I will give a positive take. I do like the scene where Barbie is sitting on the bench, just quietly taking in the real world around her; both the good and the bad. She then looks to an old woman who smiles at her. Barbie then say that's the lady is beautiful.
That I will say is a touching moment. It let's the scene do the talking with very little dialogue. And the message itself is a good one for audience to take, since in the actual world people are afraid of aging. If the movie was just about Barbie learning about the human experience, and realizing she preferred the mortal, imperfect real world to her immortal, perfect plastic one, that would be fine.