And you're basing that on what?
What I saw last season. He has some rough edges, sure. He's young.
But he also has skills that this squad lacks completely. Mainly speed, directness, and aggression. Plus a nose for the goal, as we seem to put an XI out there where Rooney seems like the only man who knows where the goal even is. When the plan revolves around Rooney that much, you are using him very, very poorly and the results will be very, very bad (as they have been - and it's not Rooney's fault).
It's up to the coaching staff to focus that raw energy correctly on the pitch.