Why didn't Shao approve of Guan Yu's expedition?

First of all, Yuan Shao's attitude is distrust. It's really hard to reassure people that a horse archer will still play after the allied generals are killed, and Yuan Shao has never been able to know people and be good at their duties.

Secondly, Yuan Shu's attitude should be mocking. Not only did he distrust Guan Yu, but he also looked down on the villains from the bottom of his heart for those who had no fame.

Finally, Cao Cao persuaded Yuan Shao and Guan Yu to fight in Hua Xiong, and persuaded Yuan Shuguan Yu to die heroically. It is impossible for Hua Xiong not to know that he is just an archer on horseback, and he gave Guan Yuwen another glass of wine. Cao Cao is also heroic.