I watch tennis a lot and he does seem to be a bit of a moody bastard. You look at Federer, Nadal, Djokovic, Tsonga and they all seem to be top blokes. Murray just comes across as a bit of a dick. When he plays as well, he has this really childish habit of huffing and puffing and swearing at himself.
I think people get annoyed cos we are all supposed to love him just because he happened to be born on the same island as us, for me it doesn't work that way. You are very much representing yourself, not a nation.