It is a terrible situation you find yourself in, and it is a shame that you are apparently not as well supported as person in your position should be. It is no wonder that you seem to be very angry.
Clearly the police/courts are not at all where you should be, and perhaps you have fallen through cracks in the system. However given the situation with your former care workers there may be no other feasible options than the criminal justice system - I find that very disappointing. It may be that you need more support and advice - I see this autism rights group covers all Scotland (despite the 'highlands' in the name):
ARGH Perhaps they can help.
I see that Autism Initiatives is a leading charity in the field, but no one is perfect, and it may be that they have official grievance procedures. They have to protect their staff of course, but it may be that they could do more for you.
I would like to thank you for your posts - they have greatly helped my understanding of autism and the problems autistic people face.