What does Mary Wollstonecraft credit for the inferior treatment of women?

The answer is: Society, women, government

Wollstonecraft believed that the society has imposed a strong gender roles that put women's value beneath the Men's. Making it impossible for women to compete in the professional field and advance.

She also put some of the blame to women at that era, who simply sit idle and accept the mistreatment given to them, and to the government who did not intervene with the situation through legal methods.