The reason for that was the ugly, negative side that the films had ushered her in. Despite growing up, she had to behave like a school girl and was always told about what to do and what not to do. She laments that she would always get told what time she would get picked up or what time she could have her meal.
Emma regrets that she often felt miserable and powerless because her life was not in her control. She also recalls how she and her co-stars went completely cold and wet for months while shooting the runaway scenes in Deathly Hallows.
She calls this phase as the most intense and grueling period of film-making. However, now curtains have fallen on the series and she feels liberated and happy.