It largely stems from the reading that the ending being sympathetic to Caleb, which I imagine happened mostly from atrocious media literacy. Caleb wasn't the protagonist, Ava was.
I don't see how you could watch that movie and think that the film maker is endorsing the way that character is treated. It's fairly obvious that those stereotypes and "her" treatment is a direct indictment of the main character. I'm not sure I can help if you don't see that.
If everyone else is not seeing a race problem, but you are, the problem may be you, not the material.
Is this disrespectful to women, or to robots?