IRGS domestic propaganda has always been that US is a military murderous malevolent regime, mercilessly going after their land and their children.

With just a little bit of propaganda spin, or even without it, US just proved to the entire Iranian population that IRGS was right all along.

This should strengthen or even harden their regime as they will have new generation of hardliners join the movement.

This is like 1930s Germany kinda thing. Who won or lost is semantics at this point, the regime is free to spin it any way they want, and will have quite the support to do it.