The spiel about not being able to prove how good he is at liverpool is fine in isolation, he didnt get alot of chances to prove himself and he was young.
However, given how fucking shite he was at a couple of other sides in dross leagues, that stands for little, especially given as one of those moves was to a former side in a league he should be more than comfortable with and the other was just a dross league full stop.
He's garbage and he has been garbage for quite some time now, id be VERY surprised if a stint at Hull does anything to change that perception. £20m down the pisser.