I've never heard of the Barbie franchise not fucking it up. "Math is tough" Barbie was more than two decades ago; the adults designing current Barbie products were likely playing with the Barbie products of that era, yet it seems like nothing was learned.

At this point I think it is safe to say that Mattel honestly does not care how many people Barbie offends. They probably have sales numbers and market research that back up their approach. I can't imagine they would feel comfortable continuing down this path otherwise.