Well, obviously her family will be grieving. I honestly don't know much about the private Thatcher- apparently she had a husband, but he's a decade dead already. She may well have been a devoted aunt, sister, a loving member of a family. That's common. People are complex.
I don't want to take a cheap shot at a dead person, but I also think it's inappropriate and insulting to ignore her life's work. That is to say, making others' worse. Demonstrably worse. Smashing labour democracy, serving the powerful, resorting to war, slashing education budgets, shifting the burden of taxes to the poor, driving people out of work, throwing people into the street, backing the Khmer Rouge and apartheid racism in South Africa. Hers was not even a policy that could defend itself on the ground of ignorance. She was well-aware of what she was doing, and she bent her formidable political skill to achieving that goal: a more hard-hearted, mean-spirited society with less for the more and more for less, above all less for women. She thought that was the right thing to do. She was wrong.
Yes, an old, demented* lady has died- but not any old lady. This one killed thousands of people. That's what bad policy means, the deaths of innocent people. Leaders have that responsibility, particularly politically talented, articulate politicians. We should not forget that.
* Is that the right word? I don't mean to be mean here, but she had dementia. Isn't demented the adjective for dementia?