It's not that they're not good enough, it's just that they don't have a chance against men, just like in almost every other industry. There's a reason why male and female actors have separate awards. Men would get best actor every time, that's just the reality of the situation. Think of music awards. How many all female bands have won awards as opposed to all male bands? How many female bands outside of the nineties and early 2000s can you name off the top of your head?

Also, every time someone says there's no good female directors, I think of Agnes Varda in her little potato suit and cry.

(Edit, sent too soon)