Why do some dishes taste worse when cooked?

Picked sour bamboo shoots are as big as arms until bitter water is soaked in boiling soup, soaked in cold well water for two or three days, fished out, and boiled in vinegar. A nosy person was brought into Zhongzhou and became a rarity ... In the eighth time of Dream of Red Mansions, Aunt Xue entertained Baoyu at home. After drinking, she specially made sour bamboo shoots and chicken skin soup for him to sober up. As an appetizer, Baoyu drank two bowls of bitterness. Inferred from this plot, in the Qing Dynasty, sour bamboo shoots probably belonged to a rarity on the dining table of a large family. Sour bamboo shoots are more common in the south, especially in Guangxi. Some local snacks in Bagui are served with sour bamboo shoots, such as Laoyou noodles in Nanning, snail powder in Liuzhou, Guilin rice noodles, Dong hot and sour soup and so on. In addition, Vietnam, which is connected with mountains and rivers in Guangxi, is also addicted to eating sour bamboo shoots, producing a kind of sour bamboo shoots with yellow skin and black beans. The mountains in northern Guangxi are surrounded by water, and there are deep bamboos in Maolin. Some bamboo shoots weigh more than ten kilograms, which has the natural conditions for brewing sour bamboo shoots.