Unfortunately, just before I watched this movie, I read a review here stating that the story was based on a "thin-as-paper, muddled plot." With that in mind and the somewhat awkward, uncomfortable interactions between the actors at the start, I almost gave it up. The timid, brittle interactions, however, were very true to the decidedly dysfunctional family of the main character rather than tentative acting.
Yes, the plot may have been overly ambitious in all that it attempted to include. Some of what takes place was a bit formulaic and stereotypical, but the events were still integral to the story development and it felt totally realistic if not ground-breaking. There is, after all, a fair amount of shared common experience in the coming-of-age saga of most young gay men. In fact, many of us are drawn to films like this because reliving some of those common experiences, distressing as they may have been when we were young, now contribute to a comforting feeling of connection to others.
The distant, confused, tender-brutal, hateful-loving relationship between father and son, I suspect, drove a great deal of this story although it wasn't the central focus. That tension and force was very effectively accomplished without belaboring the obvious.
The movie has its rough edges as quite often happens when a complex plot is carried from book to movie. Still, I found it well worth watching.