.....Fireproof (from the book of the same name) is a wonderful uplifting movie......
Your perspective is topsy turvy......I'm sorry to say.
It's a movie about redemption and it's beautiful.
Then, read Firebombed, which gives a Christian perspective on the movie. The woman in the movie was a hypergamous woman whose sin--planning to have an affair with another man while still married--was the same sin as her husband committed by looking at pornography: Lust.
As well, she withheld sex from him in order to control him, driving him to pornography, in contravence to the Biblical admonition against withholding intimacy (1 Cor. 7:5). She also clearly had no respect for her husband, in contravence of the Biblical command that wives respect their husbands. Her entire charge against him was that he didn't meet some subjective criteria of creating a state of permanent emotional ecstasy, an obligation even Christian leaders commonly try to put on husbands, but which is entirely absent from the Bible, is entirely selfish, and is also entirely logically impossible.