So Many Questions

In the opening act of Pygmalion, I had a million questions going through my head. First off, why was the daughter so unhappy? I assumed she and her mother were upper class because of the way they spoke and also because of the description given in the beginning of the scene. She was irritated because Freddie had not come back with a taxi yet, but was that any reason for her to be so rude to her mother and the other bystanders? I wondered if there was a back story that we would encounter later in the book to tell us more as to why she was so unhappy. Another question I had was who was this mysterious notetaker sitting on the bench and why was he recording what common people were saying? Was it that interesting? Then when he began interacting with other people, I thought he was very rude and I wondered still what business he had in Covent Garden.