Lu Bu lacked the humility and the will to listen and bow down to good advice. He was just too headstrong.
They miss the whisper that runs any day in your mind,
"Who are you really, wanderer?" and the answer you have to give
no matter how dark and cold the world around you is:
"Maybe I'm a king. -William Stafford
Satsu Ryu wrote:Avoid Zhang Fei a lot. Lu Bu and Liu Bei has good relations with each other. Why does Zhang Fei hate him so?
Because Liu Bei was stupid. Lu Bu was only allying himself with Liu Bei for the sake of allies so he could be powerful and so he could stand a better chance against Cao Cao. Both Zhang Fei and Guan Yu knew this. The only difference was that ZHang Fei had a nasty temper so he couldn't restrain himself against Lu Bu. Whereas Guan Yu knew, but he also knew not to act and to be patient and to wait for Lu Bu to try soemthing first. Basically, they both hated him the same, it's just that Zhang Fei couldn't control his temper the way Guan Yu could.
I think that if Lu Bu tried to rule by himself, his temper would get the best of him. But if he had capable advisors like Jia Xu, they could do most of the detail while he could inspire his troops and people.
"Now, what defines a hero is this: a determination to conquer, a mine of marvelous schemes, an ability to encompass the realm, and the will to make it his." Cao Cao to Liu Bei
The historical Lu Bu may not have been quite as much of a powerhungry degenerate as the fictional one, but nevertheless he did not show the qualities that a good leader exhibits. As mentioned before, in ignoring the admonishment of Chen Gong and alienating those around him (including the generals who betrayed him and caused his death), it is not likely that Lu Bu would have attracted many vassals or generals to fight under his banner. Most at home on the battlefield, his behavior during times of peace (drinking, women, etc.) would likely make him unpopular amongst his subjects as well.
Also, there does not seem to be much record that he was a good speaker, or particularly charismatic. He was just an impressive physical specimen who was a beast in combat, but considerably less capable at domestic affairs.