The Question and Answer section for The Yellow Wallpaper is a great resource to ask questions, find answers, and discuss the novel.
Im my opinion, the narrator was initially experiencing feelngs of sadness.... possibly a kind of worthlessness. We aren't apprised of her exact condition, although we know that Gilman herself suffered from depression. The treatment worsened her...
Are you giving me choices to pick from? Generally, I would say he represents patriarchy if not misogyny.
The wallpaper is symbolic of the narrator's feelings. Its effect on her illustrates her changing condition.