I hate one of my older sisters and my mom's parents.
I hate my sister because she's hurt me and our brother emotionally numerous times and has never apologized for it, and she's taken advantage of our mom financially.
I hate my mom's parents because her dad walked out on their family because he was sleeping around and got one of his coworkers pregnant, which caused my mom's mom to become such an emotional wreck that she abused my mom. My mom has never held anything against either of her parents, bless her heart - but I have. I'm angry and hateful towards them because I love my mom more than anything else in the world, and nothing makes me angrier than seeing someone hurt her.