Most people who hold bigoted beliefs permit exceptions. Feynman is on written record saying things like being surprised that a particular person was able to do physics, given that they were a woman. It would not surprise me even a little that there were some women that Feynman believed to be intellectual exceptions while also holding nasty beliefs about women in general.

Even if all of this is excused as a product of the man's time (I don't believe that all of it can be), it still adds a disappointing aura to the otherwise fascinating stories he tells.