I've Already Traveled Through Time, What's Wrong with Being More Arrogant?

The idiot of the General's Palace who was bullied by everyone in Dai Viet suddenly stopped being stupid one day. Not only was he not stupid, he even started to act arrogantly. He taught everyone who had bullied him a lesson. He didn't take the children of various aristocratic families seriously at all. He even dared to offend the royal relatives and his relatives. His behavior was extremely arrogant. Everyone in the capital looked down upon him, and all the ministers in the court and ministers participated in his crimes in front of His Majesty. Ministers: Your Majesty, please issue an order to put an end to this scourge of Li Fei! Your Majesty: My dear friends, what is Li Fei's crime? I don't know since when, that fool who everyone can bully has grown up to an unshakable status without even knowing it. In the court, one word can determine the outcome. In the business world, he is the business tycoon who can turn clouds and rain with his hands. Li Fei: Since I, Li Fei, have traveled through time, I am destined to leave my name in history!