I shall ignore Darkie, as I am fairly sure that Gromit had his tongue firmly in his cheek ! This accusation is baffling. I haven't missed an episode of UC for years, and there have been many women and foreigners on the Teams over that time.
Difference is that he's then going on to say that women can't out of their very nature be as clever as men. Noting that there are comparatively few women who are top quizzers isn't saying what he is at all. I'll thank you not to draw a comparison between me and that git.
I'm sure you weren't meaning it too seriously, but if a joke attempt falls flat then perhaps on occasion that says something about the joke itself, or the prospective joker, rather than the recipient.