FULL DISCLOSURE: I saw this while I was working my ass off in a foodtruck at an outdoor cinema. I missed whole chunks of it, and it certainly didn't have my full focus. I'll give it a proper chance at a later date, and alongside that, another review. However, of what I saw, Battle of the Sexes seemed to be little more than a collection of stereotypes played for comedy in a movie that not only wasn't funny, but probably shouldn't have even tried to be.
Final rating:★★ - Definitely not for me, but I sort of get the appeal.