it sounds tough.

It also sounds like agression is a really big factor in all this. Is your DF aggressive when angry, or is it mainly the older brothers?

I think you might need to find a suitable outlet for all the energy, such as sporting or some other type of physical activity and then explain that wrestling etc is done in that kind of safe environment and not at home.

They are obviously very energetic boys, but I think you might need to limit the amount of anger/agression they see every day. Do you use a time out style discipline? That might help you to gain control while still keeping your cool.

Good luck!!!