Louis XVIII handled the situation better than could reasonably be expected, I'll grant you that, but Louis XVI was not a good king. He may have been a good man- but time and time again, he was either too indecisive to act, too willing to go back on the decisions he had made, and perhaps worst of all, couldn't stand firmly behind any government that actually had a program.
I mean, it would be absurd to blame the revolution on him- even some of the most able ancien regime ministers like Vergennes were responsible for the spiralling financial crisis of the 1780s.
But Louis deserves a good share of the blame for no French government being able to stabilise between 1789 and 1792.