No he's not.
Why do you think he's doing a good job?
More on his record
http://www.stopbolton.org/record.html
That fairly well sums it up.
Bolton Effect: By pushing his own personal agenda and refusing to build consensus or find common ground, Bolton destroyed a fragile agreement that would have made the U.N. substantially more responsive and effective to the global problems of the 21st century.
Bolton Effect: This helped further the impression at the U.N. that Amb. Bolton and the U.S. were more focused on power-grabbing and cost-cutting than building a strong and effective institution capable of responding to the problems facing all nations.[/b]
Bolton Effect: Other nations viewed such statements as examples of U.S. arrogance and made it more difficult to achieve important reforms at the U.N.
Bolton Effect: Bolton has tried to appear as a champion of reform at the U.N., but his absence from crucial meetings and mixed signals on U.S. priorities led many to question the United States' commitment to retooling the U.N.
Bolton Effect: At a moment when the U.S. position on Weapons of Mass Destruction should have been absolutely clear, Bolton muddied the waters, created confusion, and weakened our hand.
Can't the UN just pack thier bags, move to Paris & not invite us to tag along & muddy the water?
Whatever, if you think being a disruptive ass is doing a good job.
Unable to win Senate confirmation, U.N. Ambassador John Bolton will step down when his temporary appointment expires within weeks, the White House said Monday.