In the Spring and Autumn Period, why did the tragedy of "killing the king 36" happen?

During the Spring and Autumn Period, 36 kings were killed and 52 countries were destroyed. The princes were exiled by doctors, and the monarch could not keep the country.

The materials reflect that during the Spring and Autumn Period, the princes held the emperor hostage, the doctors exiled the princes, and the retainers rebelled against the doctors. All people are frantically pursuing power, and they all lose power in the process of pursuing power. "In the Spring and Autumn Annals, there were thirty-six regicide, fifty-two subjugation, and countless princes who could not defend their country." At this time, the solemn ceremony and music system symbolizing "Zhou Wen" have become beautiful memories, replaced by the terrible natural state of "the struggle between people" that Hobbes said. It was an era when "civilization" abdicated and "pseudo-civilization" gained enlightenment. The primitive animal instinct in people's hearts has been liberated, and people are cloaked in "civilization" and quietly recalled to the dark world before the creation of civilization.