Though if everything is as you said SlickSlicer, if he was so "loyal" to the dynasty, why did he go to take the Emperor's power at the supposed abdication of the Emperor?
How was he corrupt? He robbed tombs of the man's ancestor's he was still claiming to protect, he drove Luo Yang into the ground, leaving a charred mess, many, many people died on the way to Chang An, which was 210 miles away from Luo Yang. He ate people... He slept with the Emperor's concubines and killed a boy who had done nothing wrong.
He also did something with gold (someone can hopefully expand on this) that led to inflation until the rise of the Three Kingdoms
In response to Xu Yuan-
1.) He was loyal to the Han in forcing the abdication of Emperor Shao because Emperor Shao was weak and stupid. He made a horrible ruler and Dong Zhuo knew that. So instead Dong Zhuo replaced him with a smarter kid who, when he was fully grown, could act as a more capable Emperor in his adulthood (while Dong Zhuo acted like what Westerners would describe as a 'regent' in the time that Emperor Xian was still growing up). Unfortunately Emperor Xian never got to occupy a position really as ruler because Cao Cao took over and Dong Zhuo was defeated. Dong Zhuo had acted as Prime Minister after deposing Shao because Xian was a little boy
. You didn't really expect Xian to rule at such a young age did you?
Also, even if Dong Zhuo was using Emperor Xian as a puppet and planned to do so for Emperor Xian's entire life, you have to remember that Cao Cao did the same thing, and Yuan Shao would have done the same thing if he took control of the Emperor and so would any warlord from this time period in all likelihood. Dong Zhuo may have or may not have intended to use the Emperor as a puppet forever. You don't know, but if he did intend to do so, he was no worse than...Cao Cao for instance.
2.) Why shouldn't you rob tombs for valuables? What the hell is the point of burying valuable stuff in tombs in the first place anyways? It was useless in the tombs, so Dong Zhuo took it out to use for a purpose
. Better the underground valuables be utilized than rot away in a tomb or lay underground for hundreds of years serving no purpose.
3.) He drove Luoyang to the ground after he was assaulted from all sides by warmongering hordes. He burned it because he didn't want his enemies to benefit from goods in the city and pillage it and all that. That would just further their war inclinations. Yuan Shu, who's general Sun Jian had been the one to take Luo Yang, would have certainly used whatever he could get in the city to his advantage and probably would have used Luoyang itself as a base to finish off his campaign against Dong Zhuo. Dong Zhuo burned the city so that his adversaries could not use it to their advantage.
4.) Dong Zhuo ate people? Where did you find that information??? O_O
5.) What's wrong with sleeping with women who shouldn't belong to a young, too youthful and undeserving kid to begin with? I see no reason why he shouldn't
have slept with the Emperor's concubines. After giving service to the Han as a fine and for the most part successful general, Dong Zhuo well deserved such pleasures. Emperor Shao meanwhile did jack-squat
to help the Han. He plain sucked. He had done 'nothing wrong,' but he had also 'done nothing.' He didn't do anything to re-organize the Emperor, help the people, etc. He was just an incompetent, worthless Emperor who deserved his fate.
6.) What did he do with gold?