"Don't bother going to this A&E for mental..."

I was in A&E for an overdose. I was put in a small waiting room for 3 hours and not seen by anyone during which time two other patients of the opposite sex to me with mental health problems were also put in the same room to wait for psychiatric liason team which I felt breached both my own and their privacy and confidentiality. After 3 hours I did see an A&E doctor who took some blood asked my about what I had done and why in a calm professional manner. Then about an hour after that the crisis team turned up. They were very offhand with me from the outset. They were more bothered about whether i had been drinking than actually asking about my mental state. Were very accusatory. And when I challenged them about this one of them had a go at me for and walked off, ending the interview after less than 3 minutes. I then heard them in the corridor saying "1 down 3 to go" which further cemented my feelings of rejection and belief that they don't care about helping people just putting a tick in the right boxes to meet some paper trail targets. This made me feel worse to to point where I had a very strong urge to self harm (which I disclosed to a healthcare assistant) Once my blood results were back I was free to go. A vulnerable young woman, with mental health problems, at 4am. Nobody asked me how I would get home or if I had the money for a taxi or showed any concern that I would walk 2 miles along an unlit, uninhabited road on my own.