Life is hard and many of the decisions we make don't always lead us to a place of happiness. Not all films are meant to make us feel happy or gleeful either. Sometimes they provide a glimpse into the darker side of life, the side where we don't always make the best decisions, but learn from our mistakes.
The Lifeguard is just such a film, where the main character is childish, reckless and damaged in all the ways that make each and every one of us flawed and genuinely human. It may not paint the best picture of an adult having a mid-life crisis, but it certainly is a real one.