Is this a strong thesis statement:

Ms Gilman captures the struggle of the narrator as she provides evidence of the journey of the narrator’s changing mental state that is not just about a woman losing her sanity but of a woman who is suffering from a feeling of entrapment because of her husband’s and society’s expectations.

It's too long and complex to be a good thesis statement.

Please shorten it to what you want to say about the narrator's struggle.

REVISION:
Ms Gilman captures the struggle of the narrator’s changing mental state that is due to her feeling of entrapment because of her husband’s and society’s expectations.

I would use "and feeling of entrapment caused by her husband's and society's expectations."

Good job of cutting!

wow, I just want to let you guys know that your amazing.

Thank you for the kind words! I'm glad I could help you with your question and provide some guidance. If you have any more questions or need further assistance, feel free to ask.