I know perfectly well what bullying is thank you, having experianced a slice of it in my younger days. Its more than just being physically abused, or even verbally so. It's being ostracised, or spoken down to, or belittled - bullying can be subtle.
Usually, I would refute cries of bullying, and Harry M certainly has shoulders broad enough to shrug off the pathetic jealous comments of others, but all the little digs, all the moments where the room goes silent at the end when the loathed Harry M has seen off one of their pals...it all amounts to the same thing - persecution.