Which was well over 20 years ago, when I was eight. Not to put too fine a point on it, it ruined by childhood. It wasn't particularly acrimonious and I saw both parents. I didn't get on with my father's new wife for about the first 8 years of their relationship (she is alright really, it was just the situation). I can just remember being angry for about 10 years straight. I was incredibly jealous of people with parents still together. My sister feels/felt the same.
I have had counselling for various issues - depression, anxiety, eating disorders - with a few counsellors, who trace most of it back to my parents' divorce.
It still upsets me that we can't all be together sometimes and that it is all fragmented. They have never seen their grandchild at the same time, only separately. I can't look at any photos of when we were still all together without getting upset.
I could never tell them how much it upset me, and still does. My mother once said that she spent all of one night crying when she heard something on Radio 4 about how divorce damages children, so I could never tell her that it did for me as she would be devastated.
I feel like it shouldn't matter now as it was so long ago and I am grown up. But actually, it just makes me more and more cross. Talking about it doesn't help.