we had one too, though he wasn't violent , just liked little boys. Three of us went to the headmaster when he took one of our pre-pubescent mates, quite a feminine and small boy, (really nice kid), to the old Victorian garages on the site to photograph him. He was off the site within the hour, the HM taking all 11 year olds plus aside for a sex education session which certainly saved the old man some not-inconsiderable embarrassment. If it had been today, he would and should have been done.
I can remember waking up one night and someone in my bed, a hard penis at my back but it went no further than that. Never knew if it was him, but I had my suspicions.
I don't have your 'anger,' nailit - maybe you need some help to work it through......I've just put it down to an experience and moved on ad, ultimately, you need to do that - with counselling assistance, if you need it.