While he was a better alternative than the criminal Clinton I have to say that he has sorted out nothing in North Korea - It's a usual game the North Koreans play - offering to make changes for concessions and then returning to what they do. NK will never give up their nuclear weapon for it quarantees their independence.
As to syria, he has been even less effective only managing to bomb the bombed to shit country for an alledged chemical attack. Fucking up DAESH hasn't got much to do with him being president.
The man has no policies other than the wall and is willing to flip-flop on nearly anything of relevance (not deporting illegal immigrants etc).