First of all, Sima Yi founded the dynasty to establish the country (Jin Dynasty). In this dynasty he founded, a number of outstanding poets such as the Seven Sages of Bamboo Forest appeared, which opened a brilliant page for China's colorful culture.
Secondly, he ended the chaos in the Three Kingdoms and brought some peace and prosperity to the people at that time.
Third, Zhuge Liang is a respected figure in Romance of the Three Kingdoms and History of the Three Kingdoms. The prototype is not that smart. Zhuge Liang in history can only be said to be a good prime minister and a good servant who devoted himself to death! Evaluation of Zhuge Liang, there is a saying that "Zhuge has been cautious all his life, not too much."
Finally, I hope everyone will not worship the character of Shu Han in the Three Kingdoms too much. If Shu Han is really good, why can't we unify China and restore the Han family? Doesn't it have an army of five tigers? Isn't Zhu Gekongming resourceful? Does anyone call Pang Tong "Feng Chu"? How can a small Wu Dong Sun Quan fail?
To sum up, objectively speaking, Sima Yi is even worse than Zhuge Liang.