It's both amusing and confusing to see him swearing in frustration after Federer's BH flick winner in WTF last year, which is the touch of genius according to the commentator.
That is one of the most annoying things about Andy Murray, he swears and gets frustrated when an opponent hits an ace or a winner that no man on earth can return/get to. Sometimes, champions have to nod their head and just say "too good."
This is why Murray will have a hard time getting to no.1 and winning multiple slams. He spends way too much emotional/mental energy on court over things he has no control over (like opponent hitting an ace or a great winner).
Federer usually just remains silent. Rafa will sometimes nod in approval. Nole applauds great shots. Murray has a lot to learn from those 3 players if he ever wants to be like them.