Why mangel is torn up

First of all she was the runt out of the rest of the group.so the rest of them hated her so they tried to pull her apart but failed to take her apart.So after a few years she was now get torn apart by the children who loved her way to much.Then one day she got so mad she just SNAPED and bit a child.So then the owner tore her up.So now she's back for her revenge to kill who ever hides from her!