There are very few things I like better in the television adaptation Game of Thrones than in the original source material. And when such a rare improvement does occur, the show has proven time and time again that it is more than capable of messing it up. One such thing is Margaery Tyrell. Although she has a large role in the show, her A Song of Ice and Fire counterpart features significantly less often. We never see the story from Margaery’s perspective, only from the perspective of others, and it’s from them that we are left to interpret her character.

(via wiki)
Game of Thrones made her much more active in the story. This allowed the show to imprint on her a fascinating and cunning personality. I know I’m not the only one who was blown away by Margaery when Game of Thrones first introduced her—she’s a proponent for gay rights, sexually active, sure of herself, and smart enough to play the eponymous game of thrones. Of course we loved her. Unfortunately, this is still Game of Thrones. Margaery seemed amazing on the surface, but when you dig deeper, it’s clear she’s just another victim of Game of Thrones’s terrible misogynistic writing. Making her more active in the story is all well and good, but it came at the expense of Cersei’s characterization, because once again, the show completely failed to realize the original purpose of Margaery’s character.