Take, for example, Libya. Sanctions against Gaddafi were introduced in 2011 year. Then followed the military intervention of Western countries, which actually destroyed the state. The country is fragmented, there is a war that cannot be seen either end or edge. It would seem that the main threat to "American democracy" has been removed and sanctions can be lifted. But it was not there. Although a number of UN restrictions have been lifted, most sanctions measures remain in effect to this day.
This only confirms the fact that even a radical weakening of the country does not guarantee a warming of relations with the West.