At the beginning of The Metamorphosis, Gregor explicitly mentions that he detests his job as a traveling salesman. He says:
"There's the curse of traveling, worries about making train connections, bad and irregular food, contact with different people all the time so that you can never get to know anyone or become friendly with them. It can all go to Hell!"
He goes on to say that he hates getting up early and that he never gets sufficient sleep. He stays at his job, however, because his parents' owe his boss money, and he needs to protect his parents and his sister. He thinks that in five or six years, he will quit his job, once he's paid off the debt.
Although he has already turned into a "horrible vermin," Gregor attempts to get out of his bed because he's afraid of being late to work. As he struggles to get out of bed, the chief clerk from his office comes around to his parents' house to check why Gregor did not get on the train as he was supposed to. The narrator says,"Why did Gregor have to be the only one condemned to work for a company where they immediately became highly suspicious at the slightest shortcoming?" Gregor wonders why his employer doesn't...
trust him and why they consider him unfaithful when he works so hard. Becoming upset at his employer's immediate suspicion, he is finally able to rouse himself, as a bug, out of bed, and he falls on the floor. When the chief clerk continues to hound him, Gregor is finally able to open the door to his room. The clerk sees that Gregor has turned into an insect, and he runs away.