As the mother of an 11 yr old boy, I want to reassure you that they get WORSE and WORSE and WORSE!!,
My DS who is wonderful and fab and smart and bright, does most of the things you mention, his room smells like troll's underwear, he argues with EVERYTHING,never gets his washing into the wash basket, he can out-pedant me, and does all of this more, often talking in this voice which makes me want to crawl into my own skull and eat my own brain.
But apart from some anger management issues, I wouldn't change anything about him.
He has so much enthusiasm for life and blows me away, he never gets tired of telling me I am fab and cool and that he thinks I am pretty and awesome. We still cuddle (not in front of his mates at the mo), and say we love each other all the time.
I say my DC's are like the sea...DS is like the sea in a storm, and makes me inhale with awe, DD is the sea on a calm and generally at the most, choppy day, and makes me exhale with relief, but I change either of them and only hope I can help them become the very best that they can be and get the most from life that it has to offer..
Enjoy..