I have a terrible habit of adopting the "Unadoptable". If it was possible I would take her. I love a challenge! I've even tamed a alley cat affectionately named "Rambo". (Turns out he was a she!)
Let this be of some comfort to you. The cat is no longer living is such dreadful condition. She is now experiencing a new and happier life with the love you all have provided. Know that she is going in peace and contentment that she would have never found where she was at. Just be with her when she goes and pet her gently into that goodnight. God will just make her an Angel in flight!
As long as there is a ASPC there will be love!!!