|I'm a little better today.|
According to Alison Flood's post, J. K. Rowling wrote a post at Pottermore.com to explain why the Dursleys treated Harry Potter so badly. Ms. Rowling wrote that there were old resentments between the Dursleys and Harry Potter's parents Lily and James. Because of this, the Dursley's took their resentments out on Harry.
Panzer says, "If you're a Harry Potter fan, you do have an account at Pottermore.com, right?"
To read the full post, tootle over to J. K. Rowling