Which missile intercept systems do you refer to? Surely not the Patriot which has proven to be most effective in Ukraine. Due to poor planning, it sounds like the Patriot stocks have been blown thru so now things are exposed.
This is mostly accurate. Patriot is effective against every "hypersonic" it's been fielded against, though that's mostly because Russia doesn't actually have a hypersonic missile. Iran, fortunately, doesn't have hypersonics–where did you get the idea they do?
Decoys are an issue. Two radar systems not really an issue.
> patriot is <5-10% effective in footage review from early Iran conflict before they started using hypersonic multiple vehicle missiles
Patriot has been about 33% effective. Becasue we fire 3 missiles at each target as standard course. Which means close to 100% intercept rate when targeted. "When targeted" may contain some bullshit, but it's a hell of a better bet than anything Postol is peddling without ample fact checking. (His record has been spotty for a while, particularly when it comes to OSINT.)
Put it another way: Iran has hit...tens of meaningful targets? In America and Israel? Do you think their missiles are just that terrible that they fire hundreds to thousands and a vanishing percentage go where they're meant to? (I'm ignoring that many of the high-value hits were with drones. Not missiles.)
While Iran isn't a superpower, they have hypersonic weapons that no system can intercept very reliably, and a sizeable assortment of ballistic missiles. Even if all other militaries joined forces, they probably couldn't intercept every single projectile coming out of Iran, at least not without depleting their interceptors to unacceptable levels.