Answer:
1. Gregor has an overwhelmed personality and feels very guilty.
2. Gregor changes the provider of the family to the burden of the family.
Step-by-step explanation:
Before the metamorphosis, Gregor had an oppressed personality because he had to work constantly, almost without rest to promote the family's livelihood and well-being. Gregor hates his job, which makes him even more overwhelmed. After the metamorphosis he has a strong feeling of guilt for not helping the family.
This feeling is the great change that Gregor presents. That's because before he felt overwhelmed, but when he became a giant insect and started to depend on his family, he changed that feeling. Before he was the provider of the family, now he is the burden.