If you want to know more about history, you still have to look at the official history. Shu is nothing at all in the History of the Three Kingdoms. In the eyes of Cao Cao and Sima Yi, the difficulty of reunification has always been there, but when attacking, Shu always came to join in the fun, so now it seems that Shu is also a menace to Wei. In fact, when Shu and Wu were at their strongest, their sum was just the national strength of Wei. Therefore, if Cao Cao simply wanted to destroy any country, he would have been unified long ago, and there would be no Three Kingdoms period.
Although Zhuge Liang was really clever, he was only loyal at that time, which made a series of excellent policies not implemented because of the resistance of some die-hards, but Sima Yi did not have such foolish loyalty. He directly saw that Cao Zhi's descendants were dying, took the throne directly, and unified himself.
In fact, Sima Yi looked down on Cao Cao, because Cao Cao's father was the adopted son of the eunuch, so Sima Yi thought he was "an ugly eunuch" and didn't want to work in his house, so he pretended to be sick. Only later had to be a servant of Cao Cao, which played an extremely important role.
Wolong is a dragon that has not yet taken off, while Feng Chu is a phoenix that has not yet grown up. Although it is a god beast, it is immature. However, Sima Yi's nickname is "Tsuzuka Tiger", which means that the tiger, who hides between graves and waits for an opportunity, has been hiding in the dark for an opportunity, although it is already too powerful to be arrogant. It can be seen that in fact, as a think tank, Sima Yi is better.