Who can give me an example of a celebrity (preferably an ancient one) who failed without ideals?

Qin Ershi Hu Hai, ignorant and ambitious, thought the throne was as stable as Mount Tai after wanton killing, and hid in the harem to have fun.

Song Huizong and Evonne indulged in pleasure and whitewashed peace, which led to economic depression, political corruption, and waste of military equipment in the Song Dynasty, laying the groundwork for the demise of the Northern Song Dynasty.

Zhao Gou and Song Gaozong don't want to fight nomads from. He feasted and entertained all day and dreamed of building a small court day and night. Nomads from the attack, instead of sending troops to crusade, seemed to flee the south of the Yangtze River.