Although he has said he's trying to calm down which I think he has done since the AO. I think his lack of preparation due to reasons beyond his control was the catalyst for his outburst and also Rusedski visibly tiring during the match and so putting more pressure on Murray.
Thats definitely fair enough - the situation was tough and with so little preparation he did pretty well. BUT...it wasn't just one call....he was repeatedly abusive....
And his passion is inspirational and contagious, but sometimes he just needs to put a lid on it.
But....I wasn't there, I'm not him - and this is only my opinion. Whatever works for him.