"Doctors know nothing about mental health"

Suffering with mental health over so many years has been a struggle. I've ended up having a really bad episode of depression and I couldn't get any help being bank holiday. I phoned 111 and they called me back and asked me to go in the next morning as it was too late that night (be glad I didn't harm myself in that time). I went in at 9am to be told there was nothing they can do, I wasted my time which I usually do when it comes to my mental health and doctors! This is why people with mental health are suffering because doctors no nothing about it! Absolutely useless!