How did kafka's own life influence the themes he incorporated into "The Metamorphosis"?

Kafka's own life influences the themes he incorporated into the "The Metamorphosis". For example he uses his real family relations to write about their distant relationships. He was the oldest of 6 children and didn't get much attention. Kafka was also know to talk about his distorted and lonely life which he incorporates into the novel as well. The mood of the novel was influenced by Kafka and his father's relationships.