

Doesn’t seem like years of sanctions on Russia, Iran, or North Korea had a sufficient impact to cause any change.
Seems like it made them more insular, more self-sufficient, and more hostile to future diplomatic entreties.
Change by force can have negative results, and change by economic means can have positive ones
What if, instead of trying to extort or kill a nation’s residents in order to force them to adopt your preferred foreign policy, you simply afforded them an opportunity for peaceful coexistence?
Putin wouldn’t be President of Russia if the US and the USSR had been able to settle their differences without a 60 year long series of proxy wars and regime changes. Neither would Trump, for that matter.
You played yourselves.