The misogyny argument says all the women in Martin's series are in sub-servant positions, positioned below men and ultimately have little to no control over their lives. While this is certainly true for certain characters, it couldn't be more false for others. Nor are all the women as one dimensional as some claim; consider Dany's evolution from the pilot to tonight, for instance. It's hard to give more examples because we'd move into spoiler territory, but suffice to say there are some strong female characters.
Given Martin has based his story on medieval Europe, it's not particularly shocking that a lady would have significantly less opportunities than males. Women were indeed used to link families and forge alliances; hell, marriage in of itself was once used as a means to transfer property and rights.
A good example is Catelyn. She's been running around during the last few episodes, but eventually she will get back to the role of a concerned mother trying to protect her family. She's one of the most hated characters in the book, as are Sansa and Cersei. Sansa for her ridiculous princess worldview and Cersei for...well, being Cersei. The most unpopular characters being female does not suggest misogyny or that Martin can't write female characters. Arya is one of the most popular characters, and many people "love to hate" Cersei more than purely hate her.
