LOL, what you are talking about. There's no comparison on earth bw Iran and the US as far as military, weapons and technology is concerned.
Iran's greatest strength is not its military, it is the geography.
View attachment 209594
War would have been over long ago had this passage not important for oil / gas. You don't need advance weapon systems to disrupt shipping in SOH. The tankers are very very costly especially with their full cargo (oil). SOH literally passes under the nose of Iran. One missile, boat, mine, UAV enough to disrupt entire traffic for weeks.
As far as missiles are concerned, there is no proof of what you said that Iran can "easily" restock the missiles used. How do you know? Do you mean the relentless bombing campaign of US didn't damaged missile production capabilities at all ? Also on reports of PAC/THAAD low on number, so same could be said about Iranian missiles. Otherwise if Iran is not low on missiles and only PAC/THAADs are low then Iran should be raining down missiles. It makes all logical sense to put pressure and come with very strong position on negotiations. The fact Iran could be low on missiles is also evident from the fact that Iran didn't hit Israel even once in phase-2 of war even when US fighter jets, bombers, tankers, awacs used primarily israeli bases. Otherwise it was golden opportunity to obilerate Israeli bases If US was truly low in interceptor missiles.