My mother had MS my whole life, so she was always suffering from a degree of physical disability (which was hard to understand as a child; she had the kind that declined over time), and as I got older, it started to affect her more and more mentally as well.
Plus, my childhood T later told me my mother was a narcissist and could be nasty and extremely hard on me....I don't remember all of my childhood (no abuse; more lack of being paid attention to...there was just no reason for me TO remember per my T; none of it was good). But my family would audio record a lot of holidays (this was before video recorders were popular)...and I have heard the way she has spoken to me, so I know a lot more than I care to know about how she treated me.
She had the extremely debilitating form where it got worse and worse until she couldn't walk at all, and eventually she couldn't focus her eyes (she was legally blind) and she couldn't grasp what was going on around her...an MRI showed her brain was shrinking. She eventually often would not recognze me when I came by to see my father.
My mother died overnight in July 2008, probably from a stroke. I still don't know how to feel about it. My parents ADORED each other before she got sick; they were so happy together...and yet I know she supposedly really wanted a child but she wasn't motherly to me at all. And it makes me angry and sad because she deserved a full life and got sick when she was in her early 30s and died in her early 60s, but had not been living for years.
So that's why I hate Mother's Day.
Hugs to everyone else out there who hates it, for all their own various personal reasons, when life is not fair and when things should be better for all of us.