I don’t have the eperience to be as sure about things as you are. I do know that the US Declaration of Idependence was signed in 1776 and the US Constituation was adopted in 1788. 12 years. Resolving revalries and establishing stability takes time.
As far as mistakes Hillary Clinton made: When you are in the arena making these kind of complex decisions, mistakes are always made. My opionion is that Hillary Clinton learns from her mistakes and successes and would have served the USA well.