I so feel for you. Alzheimers takes people in different ways. My dear husband has early onset. Thankfully he has no personality change, apart from lost confidence and depression. His is sub cortical so it’s how to do things that is most affected. For me it’s like having a small child again but one who is regressing not developing. But he is still a loving person. I don’t know how I could keep going if he turned on me.