The Trump Administration can take credit for the unanimous decisions because the Security Council is made of many nations with divergent interests.  Just before the last vote Putin stated publicly that sanctions were not the answer to the NK problem.  Yet Ambassador Haley and Secretary Tillerson convinced Russia to vote for the resolution.

You fail completely to understand that Kim is a heinous, ruthless, vicious fascist who does not hesitate to murder his own relatives or anyone in NK for any reason whatsoever.  He is infinitely worse than an "egotistical braggart."

China itself has stated that "it does not hold all of the cards."  Indeed, its position is that it can do very little and that the issue must be resolved mostly between the US and NK.

After numerous requests, you also have failed completely to state exactly what you would do different and what President Trump has done wrong;  many examples have been provided to show his successes, but you haven't
refuted a single one.