S.M.
Honey, it happens. You need to use a lot of bactriban or neosporin and there is another kind of scar reducing cream you can use. My very beautiful daughter rolled down a very steep and pebbly hill when she was 4 and was sledding. She came out looking terrible. But she healed very nicely and I doubt I did anything special because I was so young and inexperienced back then. She's 24 years old now and quite the beauty.
Don't be too hard on him. It can happen to any of us.