This is not about a boy. Which makes it feel practically like false advertisement, considering that the trailer suggests otherwise. In fact, I'd say that the trailer has covered most of the highlights where the boy was, indeed, the focus. There are only a couple more scenes besides that.
So what's the movie is about really? I think it tried to be about a couple, at first, but then it became more about the father, and mostly him. There is a reason for this "pivot", if you can call it that, but it did not feel fair, to be honest, since it made the story somewhat one-sided.
Even if that can still be acceptable, I can't say the movie has much impact. It felt shallow for the most part. A lot of stuff is being told, not really shown (not talking about narration), which does not help with establishing connection with either of the characters. Important topics are often times touched in somewhat cliched ways, too, but life is a cliche in itself, so that's not a failure in itself. It's just that darker themes still were "too bright", too "upbeat".
Perhaps the running time of a movie was the constraint here. The story is spanning multiple years, after all, and on paper it has quite a few situations, that should stir emotions. But due to lack of time there is simply not enough room to build up to them and dramatize them properly. I think it might have worked better as a TV show similar to TV adaptation of "About A Boy", where the story was also not really so much about a boy (contrary to the title), but about him building connection and changing lives of others, including his mother and neighbor.
Alas, that's not what we have. It's not a complete waste of time, but I do no think it delivers, what it set out to.
