Online Games: Three Kingdoms

Discuss the defeat of Guan Yu. Now almost everyone says that Guan Yu lost Jingzhou because he was too proud and arrogant. Not only did he die, but he also caused the decline of Shu. 1. Everyone said that Guan Yu's refusal to make peace led to the breakdown of the Wu-Shu alliance. In fact, when Liu Bei obtained Bashu and his power began to grow, cracks had already appeared in the alliance. After that, Sun Shangxiang, a key figure in the alliance, returned to Jiangdong to visit relatives, and had an unhappy relationship with Liu Bei. After returning to Jiangdong, I don't know whether he was controlled by Sun Quan or he didn't want to. In short, whether he went back or not, from now on. The alliance was almost broken at that time. If Sun Quan's sneak attack on Jingzhou was still a little shackles when Sun Shangxiang was there, then after Sun Shangxiang returned, Sun Quan almost didn't care about it at all. Sun Quan was a hero. In order to prevent Liu Bei from returning to marry his parents, he could send people to kill Sun Shangxiang together. So if Sun Quan had given up on the sneak attack on Jingzhou because of Guan Yu's daughter? Almost impossible. 2. When Guan Yu was fighting against Wei, Cao Cao almost wanted to move the capital, and in the process he sent Yu Jin, Pang De, and Xu Huang to rescue him. The State of Wu has completed the preparations to confuse Guan Yu's generals and mobilize troops to attack Jingzhou. At this time, what are Liu Bei and the others doing? Some people say that Liu Bei has just captured Hanzhong and is out of soldiers and horses, unable to support him. Others say that Guan Yu fell too quickly and Liu Bei had no time to save him. I think both of these arguments are unconvincing. 3. Regarding Guan Yu's arrogance, which caused his soldiers to fear and betray, the two most important people among them are Dr. Ren and Mi Fang. Do you still remember Mi Fang, Liu Bei's brother-in-law and Mrs. Mi's brother? Is this because after Mrs. Mi's death, Liu Bei completely forgot about this brother-in-law, which led to Mi Fang's dissatisfaction? Otherwise, Mi Fang would have given up her career for so long because of fear of Guan Yu, not to hang out with her brother-in-law, and to embrace another person's lap? In my humble opinion, there are three choices in this matter: 1. Send someone to contact Soochow and reaffirm the offensive and defensive alliance. If Wu and Shu work together at this time, even if Cao Cao cannot be destroyed, they can still severely damage Cao Cao. 2. As Longzhong said, Liu Bei led his troops out of Qinchuan. Even if he could not make any progress, he could still contain a large number of Wei's troops. If there was a tacit understanding with Soochow, the effect would be even better. 3. Even if he is unable to occupy a larger territory at this time, he can still send elite soldiers and generals to help Guan Yu guard the rear. Even if this is not possible, he can still make the underworld near Jingzhou under Guan Yu's control. However, Liu Bei did nothing, causing Guan Yu to be unable to enter even if he had a city. In the end, he was defeated and killed, and the Kingdom of Shu also declined. Corrections welcome.

There's no one here to test the poison and give me some advice?