How to understand Gregor's alienation in Metamorphosis?

It can be understood as follows: in capitalist society, under the pressure of machine production and survival competition, people are alienated into non-people, and their nature is lost, even going to the opposite side. People can't accept the real world, and the real world can't accommodate people. Grigor turned into a beetle, which is also a symbol, symbolizing the alienation of human beings, human nature and interpersonal relationships. In the face of money and self-interest, the novel shows two kinds of alienation: Grigor's alienation, people become beetles, and their nature has changed, from earning money to paying off their father's debts and striving for independence and freedom to being complacent about the beetle's life; The relatives represented by the younger sister are alienated, the affection becomes hatred, and the kindness becomes cold. The novel reflects the social essence of capitalist system destroying human nature by expressing human alienation.