Why did the liu bang over throw the qin dynasty?

Liu Bang overthrew the Qin Dynasty primarily due to widespread discontent with the harsh and autocratic rule of Qin Shi Huang, which included heavy taxation, forced labor, and strict legalism. The Qin's oppressive policies sparked rebellions among various factions, including peasants and former officials. Liu Bang, a former peasant himself, capitalized on this unrest by rallying supporters and leading a revolt, ultimately founding the Han Dynasty after defeating the Qin forces. His rise to power was also aided by his promise of more lenient governance and the restoration of feudal systems.