You're making feel guilty for even posting here. What I've complained about going through with my Mom is nothing compared to what you've done.
You're a saint for taking your Mom in for a year and sacrificing your whole life in the process.
It sounds like you've done everything humanly possible to give your Mom the best quality of life considering the disease she has.
I hope in time that your Mom will mellow, and become more receptive to her surroundings.
My Mom was extremely unco-operative, crying, wanting me to get her out of the nursing home for the first 2 months that she was there. She doesn't love there now by any means, but she has adapted somewhat. I hope things improve for you as well.