Anne had strained relations with her mother, what caused this strain?

Anne’s journal entries generally refer to her mother as a person who is not really a mother to her. She writes that her mother picks on her and treats her unfairly. Anne feels this unfair treatment is because she is not as intelligent as her sister, Margot. In her first diary entries Anne writes that she hates her mother with little reserve. She hurts her mother’s feelings by refusing to say her nightly prayers with her and instead asking for her father. When Anne gets older, she feels guilty because she so freely accused her mother of not understanding her, yet did not take the time to get to know her mother either.