I don't doubt his ability. You do.
However, his attitude is another story.
Honestly haf, you're in the minority on Lukaku for a reason, and it doesn't have a thing to do with others wanting him to succeed just prove themselves right. I've never seen someone hold a grudge against a player more than you do with Rom. People don't take you seriously on the subject because you harp on every little thing to the point where it's behind petty.
If his heart isn't on it then fine, ship him off and fair enough, but I'd rather keep him if he wants to be here.