Is Sima Zhong the only stupid emperor in history?

No, except those minor children, there are more or less famous emperors in history. There is also a Jin Dynasty, namely the Eastern Jin Emperor Sima Dezong. Besides, some stupid emperors were Song Duzong Zhao Qi. Besides, Song Guangzong later suffered from mental derangement, which was a fool.

Introduction to Jin Huidi:

Sima Zhong (259-307), Jin Huidi, the second son of Wuyuan's mother and the second emperor of the Western Jin Dynasty. He was in office from 290 to 307. On 17.

In 267, Sima Zhong was established as the Crown Prince, and in 290, he acceded to the throne, renamed Yongxi. He was a deranged man, who got help from his teacher Yang Jun at first, and then Jia Nanfeng killed Yang Jun and seized power. In the Eight Kings Rebellion, Hui Di's uncle, Sima Lun, the King of Zhao, usurped Hui Di's throne and imprisoned Hui Di in Jinyong City as the emperor's father. Sima Tang, the king of Qi, and Sima Ying, the king of Chengdu, rose up, and their ministers * * * killed Sima Lun's henchmen, welcomed the restoration of Emperor Jinhui, and punished Sima Lun and his son. They were also taken hostage by the king and humiliated like puppets. In 306, Sima Yue, king of the East China Sea, welcomed back to Luoyang. In 307, Hui Di died at the age of 48. According to legend, it was poisoned by Sima Yue, the king of the East China Sea.