Nora. Welcome. I am not going back to read the original old post but commenting on mother daughter relationships.
I'm no doubt considered a moody adult daughter also. I'm 60+ and my mother is 90+. And she was considered a moody, difficult daughter! All sad but true.
I agree with SWOT that by my definition being a Mom doesn't mean its my responsibility to always fix things.
From my perspective there's a point at which we have to put aside our childhoods and try to establish adult relationships. For those of us with sad childhoods it requires forgiveness. We have to forgive what happened in order to move on. In my case to this day my mother sees herself as perfect in every way and considers herself a perfect mother at every moment of her children's lives. So I can forgive, and do for my own mental health, in a theoretical way. But I can't forgive her as a person because she doesn't want forgiveness as she sees nothing wrong. So that will always be hard.
The question then is can I establish an adult relationship with my mother. What do I expect and what do I want from that relationship? Is my mother capable of giving me what I need and want? Sadly my mother has never had the ability, due to her mental illness, to meet the needs and wants of myself and my kids. I tried on and off for many years. Every few years wipe the slate clean and try again. Never worked. My over-sensitivity? Maybe to some extent. But then she's also made it clear that I'm a total disappointment and she doesn't want me around as an embarrassment to her. After all, my children are of a different race, one is an addict in prison, one has autism, etc etc. So its never going to work and I gave up.
The question re mental illness is always can the person control their behavior? Eg if the person is psychotic they probably can't. If they are depressed can they? This is where forgiveness gets hard. We can forgive the person who can't control themselves. But if we think they can control it then forgiveness is harder.
From the other side, I'm not a perfect person or perfect parent. My kids have things to forgive me for. I hope we have worked these things out. But I will never be their ideal mother nor, is it likely that one will ever be the son I had hoped for. This is life. Forgive, forget and move on. Actually I have two mottos I live by...
One day at a time... Ie live for today only
And
The AA prayer.. God grant me....and this is where I know that I cannot change my mother. However, nor can I accept the way she treats my children and myself.