Pakistan is a third grade country, what are you gonna do against 50 F-35Cs that can wipe out your entire air force? or carrier strike group that can wipe out your entire navy and air force before you even leave the port.
Simple, after World War 2 ended, a new rival arose, and new US interests appeared around the world. did you expect US to just withdraw back home and let Soviet Union consume most of the world?
then the rest of oil producing countries will enjoy a slight rise in oil prices and Iraqis will watch their economy crumble
Russia and Saudi Arabia alone can fill 5 million gap with pleasure, additional OPEC countries will also jump up in joy as they can once again increase production.
thats...
if your country resorts to asymmetrical warfare, you have already lost, US has no intention of occupying Iran, just completely crippling your country, and if you are resorting to asymmetrical warfare, well then your country has already been crippled in every possible way.
Su-25s will remain in service with post Soviet nations for quite some time, Azerbaijani Su-25s which are being equipped with Talisman protection suite, Aselsan avionics and targeting pod, NATO type laser guided munition will be the most advanced Su-25 in the sky.