I wonder if this is actually Harry's problem with the media; he's put out because he doesn't get the reaction from people that William does and feels he should.
He did when he was younger. William was always seen as more staid and more reserved, and then he was a married man and a father when Harry was still the dashing young bachelor prince.
Now it seems to have gone completely the other way. Charles and William genuinely seem to enjoy mingling with the crowds while Harry always looks tense and miserable and not approachable as he used to be.