What was the reason why the Kuomintang regime collapsed in just three years during the War of Liberation?

When the Japanese army arrived in the village, everyone in the village ran away and hid the food. Later, the Kuomintang troops also arrived in the village, shouting and arresting young men, and snatching food from the common people. Later, the common people saw them and ran up the mountain. The People's Liberation Army came, the People's Army came, and they started running up the mountain. When they came down, they found that there was not a lot of stuff in the house. The water tanks were full, and the firewood was chopped and piled up. The grains taken away had IOUs on them, and there were also silver coins placed on them. Later, when the people saw the People's Liberation Army coming, they stopped running away. Help the People's Liberation Army build a new world!