You seriously expected the link to contain those words?
It's a matter of opinion and mine is that the greedy ones like that are indeed cnuts. He was already offered a very high wage, reportedly to be top 3 earners at the club and wanted more. So when a fee has been agreed between two clubs and the player doesn't sign purely because of money I think it's a perfectly valid opinion to call them for what they are.
I think Man United needs to stay away from such players at all cost. They have a trash attitude and think they are entitled to whatever. They are already being payed filthy amounts in wages so it is indeed a very scummy move to sit and demand more when you have already been offered crazy wages and then pull out of a deal because your over inflated ego thought it was "too little"
It is not exclusive to Rabiot, it happens many times and club should never negotiate with such players.