I'll concede that monogamy doesn't work very well, but there are cases where the men interpret the rules, and women follow them more sincerely than the men. Many a man had a godly wife who kept him in line.
As to whether women are more prone to lesbianism than men to homosexuality, I don't have an opinion on that. A lot of the homosexual men are very attractive, where all the lesbians I have known are unattractive. Also, it seems to me that both prey on both to validate their unwise choices and to recruit. There are confused, hurting women who more easily fall prey to seduction by lesbians than if they had a satisfactory heterosexual relationship.
Maybe they used to keep things like this quiet better, but it seem that the proportion of gays to straights in our society is increasing.
I don't like to think that polygamy was a lesser evil because women had no rights back in those days and few women really like to have to share a man, just as men seem to want a women who is faithful. I would have hated polygamy and having to service a man who spread his seed around.
Remember, Jesus told us that "in the beginning it was not so", and sought to return marriage to its intended state; i.e., between one man and one woman.
Hence I view polygamy and all the other gamies as social constructs rather than fulfilling the ideal for men and women.