Leaving the cinema after watching the film adaptation of Dear Evan Hansen, a very opinionated young man in front of me (approximately 14-years-old) exclaimed "I was with it until Evan sang at Connor's memorial, then I was like "Wrap it up." I couldn't help but sympathize. He was right. Generally, the plot sustains its thrust until this point, then it begins to meander, then blows apart. But this was always …