Complex sentence: Edith Roosevelt, the First Lady, disliked the growing closeness between the two men, feeling they were too much alike, and that the president did not gain much from the advice of someone who rarely contradicted him.
Split into simpler sentences: Edith Roosevelt, the First Lady, disliked the growing closeness between the two men. She felt they were too much alike, and that the president did not gain much from the advice of someone who rarely contradicted him.