What type of relationship did Gregor Samsa have with his family?

The relationships in the Samsa household are defined by
tension and resentment. Before his metamorphosis, Gregor is the only working family
member. His job as a salesman supports the family financially, and Gregor takes his role
seriously. He often sacrifices so his family can be comfortable, although he does
sometimes feel slighted (meaning he doesn't think his family appreciates him
enough).

Gregor's father has failed to support his family
himself, so he behaves aggressively toward his son, due to his feelings of inadequacy.
Gregor's mother tries to defend him on occasion, but she gives in to her husband's
anger. Gregor's sister seems to be the family member for whom Gregor holds the most
affection. Before he changes, he expresses the desire to pay for her musical
training.

Unfortunately, after his transformation, every
memer of the Samsa family abandons Gregor, wanting him to simply disappear. They are
disgusted by his appearance, and there is a sense that they somehow feel betrayed by his
misfortune. In the end, he sacrifices himself once again for their
needs.