Race is a relatively recent concept that grew out of the Transatlantic slave trade, so I'm not certain how that could possibly be true. Humans are 200k years old, and women have been property in any number of societies going back to our earliest recorded history.
That aside, it's not a competition. Racism fucks up lives. Sexism fucks up lives. Combined, they fuck up lives even more. I can name a long laundry lost of how racism fucks up lives, including my own. But you seem to think sexism has no legitimacy as a concept.