The Living Ci Emperor

Li Yu, the eternal Ci Emperor, was given poisonous wine by Song Taizong Zhao Guangyi and died with resentment and unwillingness. What was this eternal Ci Emperor thinking when he drank the poisoned wine and suffered in his final life? What would have happened if he did not live in that era, was not the empress of the Southern Tang Dynasty, but was just a person without the burden of being an emperor?