I believe you’re right on the mark, he’s sick of it and wants it to just go away.
He has said nothing, in fact Barr a week ago said that he told Mueller, who he is friends with, if you have anything to say, anything at all about the findings, feel free to go on TV or wherever you want to discuss it and Mueller said NO..he wants no part of this nonsense anymore, if he had something to say he would have said it