My sister was a senior staff nurse on A & E at a large hospital in Nottinghamshire and she would often end her shift in tears but as she said they worked on a triage system, people who had obviously minor problems, were often pushed back when somebody with a more serious problem came in. As she used to say it was often upsetting but who do you treat first, some Fosters head who has a broken nose from a drunken brawl or somebody who has had a major heart attack. She also has a scar on her shoulder that required 17 stitches to close, curtesy of some junkie with a Stanley knife who thought he deserved priority treatment, so don't blame the nurses they do their job as best they can and if it some times looks a bit chaotic, it is when you've a normal shift rolling along quite nicely and then you start to get victims of a multi car RTA rolling in.It's not perfect but in general it works pretty well