What elements of this novella distort the readers sense of reality, while at the same time make gregor samsa situation seem very real?

According to the reading of “Metamorphis”Gregor Samsa was a traveling sales man he supports his family. one day he woke up finding himself becoming an insect. at first he thought he was dreaming but later he realized that he was not dreaming. in the story gregor was not getting well and his sister stopped taking look after well he was feeling isolated from the family. he suffered hunger, pain. since he wasnt geeting well his family was deciding to vanish him but he secrificd fimself for family good.