Well, I would be part of the privileged minority of males, so it would be better for me.
The world population wouldn't crash overnight though. Society would probably change a lot if that were the case. Polygamy would probably be the norm. Men would probably be the overwhelmingly dominant gender -- not simply because of ability -- and would probably have large families of mostly daughters. Sons would be highly prized since they would carry on the family name.
However, this inequality would not be perceived as "oppression," since there would be too few males to oppose it. It would simply be a fact of life.