Because they think the best woman is still worse than the worst, man

Usually only mediocre men are afraid, because now there’s more competition and they have to try. The study I always think back to is the one that shows that low skill players are often the most likely to hurl sexist insults at women in lobbies.

Why are some men scared of successful women?

Projecting their own failings onto others.

Men who are inferior to their fellow men, are always most anxious to establish their superiority over women. -Mary Wollstonecraft