Why do so many people blame Zhuge Liang for Wei Yan's death?

The reason why many people think that Zhuge Liang killed Wei Yan is because in The Romance of the Three Kingdoms, Zhuge Liang always disliked Wei Yan, not only saying that Wei Yan was? Born anti-bone? , but also never adopted Wei Yan's plan. After Wei Yan's death, he handed over the power of the army to Yang Yi instead of Wei Yan, so Wei was unconvinced in all aspects and attacked Yang Yi, and Wei Yan was killed by Ma Dai, so Zhuge Liang was responsible for Wei Yan's death.

Wei Yangang began to want to take refuge in Liu Bei, but he never met Liu Bei, so he stayed with Han Xuan. Later, Han Xuan and Liu Bei fought, Liu Bei sent Guan Yu to fight, and Han Xuan asked Huang Zhong to fight. On the first day of the confrontation, the two men tied. The next day, Guan Yu took Huang Zhong, but he didn't hurt Huang Zhong's life. On the third day, Huang Zhong won again, and Huang Zhong didn't kill Guan Yu in return. As a result, Han Xuan tried to kill Huang Zhong. Fortunately, Wei Yan encouraged his men to rebel, killed Han Xuan, and then Wei Yan defected to Liu Bei. As a result, Zhuge Liang once said that Wei killed Huang Zhong.

Later, although Wei Yan joined Liu Bei's camp, he also gained Liu Bei's trust and established many military exploits, but Zhuge Liang still didn't trust Wei Yan, which also led to many ministers in Shu and Han Dynasties crowding out Wei Yan to some extent. Later, Liu Bei died, Zhuge Liang led troops to the northern expedition, and Wei Yan's repeated suggestions were not adopted by Zhuge Liang, which made Wei Yan very depressed. After Zhuge Liang's death, Wei Yan was originally the most suitable person to take over the military power, but Zhuge Liang handed over the military power to the civilian Yang Yi, which led to Wei Yan's no return.

Although Wei Yan did it himself on the whole, I think Zhuge Liang actually has a great responsibility. After all, he failed to handle the relationship between Wei Yan and other subordinates, and he didn't trust Wei Yan enough, which led to Wei Yan being excluded by ministers. So it is not unreasonable for Zhuge Liang to kill Wei Yan.