How to use the plot in the book to refute the evaluation of the characters in "Journey to the West"

Tang Sanzang should be a coward, he was caught and frightened. But Sun Monk is not just a wild monkey. Sun Wukong has a very high level of understanding. The book often mentions that Wukong discussed scriptures and Taoism with his master, and occasionally enlightened Tang Sanzang. Moreover, Sun Wukong was transformed from the spiritual stone of heaven and earth. He studied under Patriarch Bodhi and worshiped the Great Sage Qitian (although in name only). From his birth to becoming an immortal and becoming a Buddha, it was not a coincidence and was closely related to his own abilities. Zhu Bajie is a pig, but he is not stupid. Although Zhu Bajie has no great abilities, he has a very good social circle. He can laugh with the gods, gods and Buddhas. Others helping Sun Wukong may be because they have orders from above to surrender to the power of the practitioner alive. Bajie is a very real character. Monk Sha is a tragic character. His path to immortality was bumpy, and after being demoted, he suffered the pain of being pierced by thousands of swords. However, he still willingly followed Sanzang to learn scriptures, and finally became an Arhat.