Why did the third estate want a different government?

The Third Estate sought a different government because they were frustrated by the inequality and lack of representation in the existing political system, which favored the clergy and nobility. Comprising the majority of the population, they faced heavy taxation and limited rights while having little influence in decision-making. Their desire for a more equitable government stemmed from a push for social justice, political reform, and economic relief, ultimately leading to demands for a constitutional monarchy and greater individual freedoms.