I'm actually fairly relaxed about delays. As in, for example, the aircraft needs a de-ice that hasn't been planned, someone needed had called in sick, there is a technical problem. Whatever. I'm in a nice warm terminal (or nice cool terminal) with a book to read. If it goes on a long time then I will probably get a meal and maybe a room.
All of that is a lot better than a crash due to ice on the wings, an exhausted pilot, an EFATO.. Lets remember no company wants to lose passengers because of poor on time performance. The staff are under stress, and nagging them won't fix thing one. Same applies to buses and trains. Relax.