One of the points that the filmmakers are expressing that I've been most impressed / encouraged by is this idea of asking questions more than giving resolute answers (Gosling has gone so far as to frame it almost as a "whodunit" with the mystery left up to the audience). Moreover, they've made a point about Williams' character defying all this standard relationship philosophy that says you should be thrilled and satisfied to find a man who loves you and your child, like what could be wrong if that exists. And what of a man who wants nothing more than to love his wife and child?

Again, I unfortunately have not seen this movie, but it seems like the filmmakers' intentions were rendered well on-screen according to your judgment.

>It was kinda nice to see that there wasn't one specific
>incident that led Cindy to her breaking point. There are a
>number of subtle things that Ryan Gosling's Dean does that one
>could see adding up. The basic gist that I pulled away from
>the piece is that Cindy simply got tired of his childish lack
>of ambition, and his inability to listen to her. And again,
>there is no specific event that leads her to this conclusion,
>it's just a series of things and words and actions.