Is “In real history, he was a decision-maker in peace negotiations or warfare, but the novel reduces him to a barbarian general who challenges the enemy to battle.” true?

In the History of Song, Biography of Yue Fei, a few words 'Again, he submitted a memorial saying: "The Jin people established Liu Yu in Henan, intending to devastate the Central Plains, using Chinese to attack Chinese, so that Nianhan could rest his troops and watch for an opportunity" explain his background; in the novel The Story of Yue Fei, Chapter 73, 'At that time, Wu Qimai died, and originally Nianhan's eldest son Wanyan Dong was established as the ruler' arranges specific micro-actions to stimulate the reader's emotions.