The Question and Answer section for A Streetcar Named Desire is a great resource to ask questions, find answers, and discuss the novel.
I don't know if "win" is the right word. Stanley's life isn't going to get any better because Blanche is dragged off. Stella knows in her heart what has happened and one can wonder what happens to their relationship. I think, in the end, Williams...
From the text, we can infer that Williams believed human sexuality to be a base instinct. His portrayal of sexuality is largely based on need and lust.... with little else in between.
I think that the beutiful sky makes the poor, decaying street more beautiful than it would otherwise be.