Have you got any appointments upcoming, @SB1967 , e.g. with your GP or the community mental health team? What 'next steps' were spoken of when you last had an appointment (I don't mean the A&E interaction, I mean your more 'routine' appointments)?
You've mentioned that an autism assessment was spoken of in a previous appointment. Have they given any indication of a timescale? And are you sticking with any of the anti-depressant medications that have already been tried, just in the hope they might be doing some little thing to keep you going?
I assk partly to get a sense of what help is currently underway or in the pipeline: I'm hoping that there is some supportive infrastructure around you, even if you don't experience it as being helpful.
But I'm also asking this to try and understand something that is very striking about your posts: I get the feeling that there is a very strong impulse in you to mistrust or discount whatever attempts are already being made, in favour of looking beyond those attempts in pursuit of something else - new medication, electro-therapy, a care home.
You very often make reference to your suicidal thoughts and activities, and I wonder if that is because you don't trust us to see (to really, really SEE) how unhappy and desperate you are. I wonder if nothing we say really gives you confidence that we do see that. And I wonder if that is how you feel, too, about the professionals that are trying to help you. So whatever they are offering, you don't really trust them to have seen exactly how desperately you need help, and you push for something more or different in an attempt to convince them how much you are suffering.
I'm sure that there is a lot in your frustration that is completely realistic, because mental health care is so often slow and/or erratic, and can seem bureaucratic and uncaring. But I also want to try and reassure you that, no matter how inadequate their response, they almost certainly will have seen your level of distress and do care about helping you. Same as we, too, on this thread do see you and do care.
So I hope that, even if you want something more and different, which may or may not be attainable, you will feel able to engage with what is on offer, and to try and trust that the professionals involved really do see you as deserving of their care.