The trouble with the way the show over simplifies things is it kind of robs the narrative of a lot of its themes and resonance just for the sake of making the people they like seem cooler and the people they don't like more disposable and peripheral.
Like in the books Tyrion faces a lot of genuine hardships, some of them directly linked with prejudice and bigotry because he doesn't look like everyone else, and he does not always have the institutional power on his side to say exactly what he wants to say and stand up for himself. On the show, he quips his way through every obstacle, because people who encounter prejudice and can't laugh directly in its face every time aren't as likable apparently.
In the books, Brienne is a woman who has never felt especially comfortable in expressions of femininity but speaks highly of womanhood and develops strong bonds with many vulnerable people. On the show she tells Jaime to stop acting like such a girl, because women are weak and girls are cowards, I guess, and a butch woman must innately despise expressions of emotion and view them as disgustingly feminine.
In the books, her journey explores the repercussions of violence and how her concepts of right and wrong have been overly naive. That her ideas about honor do not actually help the weak and vulnerable people she thought she was striving to protect. She spends much of her journey not engaged in combat, never slaughtering needlessly, and when she finally does kill a man for being an unrepentant rapist, she is sobbing as she does so, horrified by how ugly all of this truly is.
On the show, she's a huge idiot who stumbles past the two people she's supposed to be looking for and lets them slip past her over and over, which I guess people are supposed to find more interesting than her journey of self-discovery that fans hated so much.
But then, I think AFFC is great.