These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: A Thousand Splendid Suns
Complete Monster: Rasheed is nasty, violent-tempered, smug and thoroughly heartless, spending the book ruining the lives of the protagonists in a myriad of ways. Marrying a 15-year-old before promptly raping her and tricking a 14-year-old into marrying him immediately after her family is killed by paying a man to tell her surviving love interest is dead are just a few of the many terrible things he does and let's not go into what he does to his own family. His nature also comes forth in beating the tar out of his wives on a daily basis, completely neglecting his daughter in favor of his son, forcing one of his wives to eat pebbles because he thought her rice was undercooked, and shoving a gun into the mouth of one of his wives and finally trying to strangle her to death. When his wives try to run away, he tells the youngest one that if she ever tries it again, he will kill his other wife (her only friend) and her daughter in front of her. She knows he's not joking, because he's just put them all in sensory deprivation rooms in the blistering heat with no water for three days. What little sympathy the author tries to create for him by letting us know his first son died is quickly dashed away when it's implied that his own drunken neglect probably caused it.
The Woobie: Hoo boy, Mariam. Both women are Woobies after having to live with Rasheed, but Mariam's life is one big Tear Jerker. She had a mother who committed suicide and a father whom, she found out, was ashamed of her very existence. She was forced to marry an abusive brute, and she couldn't even have children, which she desperately wanted. After years of marriage, she is pushed away in favor of a younger, prettier woman. And when she finally takes control of her destiny by killing Rasheed in self-defense, she is executed for it. Tragic Hero, indeed.