"God" is an idea and as such is something very hard to kill. It is dying slowly from the science and reason. Like any mortally wounded anyone animal however it becomes more dangerous, desperate but one day eventually it too will recede into myth.
I can see where you are coming from. My mum always wanted to be a grandmother. As soon as she became one (my first child), she started to lose her mind (Dementia) and never got to enjoy being a grandmother. So I had to deal with a very ill, sometimes violent mum and with a young family. Yes God is cruel. But then I prefer to think that there is no God as I could never trust and believe in something that allowed so much suffering in the world. It is only chance.