The Question and Answer section for The Metamorphosis is a great resource to ask questions, find answers, and discuss the novel.
This question calls for you to use your own personal experiences in formulating an answer. Think about your school, and think about which students tend to get isolated. Who are they? Are they isolated because they look different? Act different?...
I don't think Gregor had a lot of authority to begin with. I think the stick represents the deterioration of any family connection between Gregor and his father.
Gregor is conflicted because even though removing the furniture allows him more room to be physically comfortable, it also takes away the emotional comfort his own belonging provide him.