My oldest son is 11.
This morning I have had banging doors, swearing (lots of it), coupled with
"I hate you. You are the worst parents in the world. You are the reason my classmates laugh at me. You make my life worse, not better".
When will it end?
For sure, a difficult child will be a difficult Teen, or preteen.
But I dont have the energy. 
I also have an exam today. And the last few months of stress and shit just makes me want to go back to bed and cry.
I dont want to be a grown up.