What is the film Stepford Wives suggesting about gender roles and the relation between men and wome?

I don't think you will get any straight answers to your question because people simply can not remain coherent when talking about gender roles and relations between men and women. A lot of people can't even remain polite.

BTW there are two films, 1975 and 2004, so you have to specify which one you are talking about. I am told the 2004 version is a comedy.

General information: en.wikipedia.org/wiki/The_Stepford_Wives_(1975_film)