My boys are always shouting and screaming at me, we have no peace in our house

Often when we first separate from our partners we are emotionally confused and often our parenting suffers for it.  We might find ourselves shouting and screaming at them, we are their main role models, therefore are they copying us?  Try and spend some family quality time, lay down some family rules, try a parenting course, once we find some peace within ourselves, we can deal with our children with calmness and patience, which in turn can rub off on them.