What are you, 12? Ofcourse he could have handled it better, no he shouldn't have made a fuss on twitter. Young people do things like that, they don't think about the consequences. The media circling him like vultures during that period, emphasizing everything he says, and several sponsors putting him in stupid positions like this vid for instance, didn't help creating an image of a modest, yet ambitious guy.
Stop acting as if you know what you're talking about or what has been said/done during that transfer period.