It sounds like it's associated people with bad things, my adult male, Benny, when he was a hatchling was pet shop bought and was resultingly very aggressive, whenever he saw people he would go into a striking position and attack anything that went near him, as an adult he's still shy but I can handle him. It will take some patience with a fearul snake, you could try holding him while your feed him, I do this with my hatchlings so they associate me with good things and actually come to the front of the viv to be picked up lol. you could also try simply holding your hand infront of the snake for a few minutes each day so it will eventually get used to your hand coming in, get used to your scent and learn nothing negative will happen. It's easiest if you approach the snake whilst it's in a hide or somewhere it feels safe then it's less likely to flee. Another thing I used to do with Benny is let him coil up in my sleeve and sleep their for a while, the only problem with this is I did it with my female when she was a hatchling too and she still tries to go in my sleeve despite being 4 and a half feet long! lol
If I've mentioned any of this already I do appologise lol.