This is a story about insecurities and incapability to cope with them.
A quiet guy can't find the right words or socially accepted moves to gain acceptance from his small-town neighbourhoods. The anger of failure comes more and more out of control. He thinks he is control when he has safety-matches in his pocket. From that point on, the character gives thrills to viewers, waiting for the moment when something will terribly go wrong.
Movie is more about the atmospherics, fater/mother -son relations and disturbing thrills not big twists and turns.