I agree; I think he lost interest in the presidency once he learned he couldn’t rule as an absolute monarch (and he publicly lamented the checks & balances), and then he saw himself roundly rejected by voters this past November.
He’ll go back to mixing with people at his level (low-information types); he is too thin-skinned for any serious discussion.
I think he’s going to attempt to enter the UN at some capacity and this will lead to a face-off between him and Trump.