He's not s***e. He's a young player in a new team that's going through an absolute s***show of a season, where even the key established players have been well below their usual levels.
I don't know if he's ever going to be as good as we want him to be (prime Robertson). But he's seemingly instructed to play in a completely different way to how he did when he was regarded as one of the best left backs in the league. Like so many other things, this is on the manager. He's never shirked it though - 100% effort whenever he's on the pitch, which is more than you can say for several others, including the gutless, predictable, pedestrian Gakpo.