We too live in an isolated area with her across the street and I often see my little niece and nephew get yelled at for waving to me - they use to love to be with me.
Needless to say, I have struggled with intense hatred towards her even though I know it's wrong. It does help to remember that this person is actually going to hell and until now, no one has taken it upon themselves to pray for her. I kind of vacillate between remembering and forgetting this but praying for her is the only relief I find in this emotional storm. This is definitely easier if I do not interact with her, observe her comings and goings, assume things about her thinking and behavior or hoping she gets a comeuppance. In fact, this horrible situation has forced me to turn to God on a daily basis to find peace.
During our short time here on Earth as Christians we will suffer the hatred of Satan and he will use whatever he can to stop us from seeing the big, eternal picture and from praying for his victims. This is no surprise but in our fallen nature we easily forget and are inclined to demand instant, perfect justice. That is not going to happen in this life so we cannot give up or give in to hatred. Hatred will come to you as a temptation as long as that injustice goes unpunished. We just have to keep choosing to forgive and pray for our enemies. Satan hates that!