Perhaps stop taking the administration's claims at face value. Their army has not been destroyed. They continue to launch missiles daily and have been extraordinarily successful in targeting US/Israel radar and defensive assets throughout the region. They have suffered air force and naval losses, but if you look back at analysis from before the war started, exactly nobody considered the Iranian air force or navy to be of any strategic significance. Iran operates on a distributed military structure rather than a centralized command, so the assassination of senior political and military leaders is not the crippling blow the US expected it to be.

And really, that expectation is itself stupid. Suppose the US got involved in a hot conventional war with another superpower, and in the first week they killed the President, the vice President, a bunch of Representatives and Senators, and a bunch of senior figures at the Pentagon. Would the US just fold, or would it fill those positions via the line of succession, declare a national emergency, and fight back vigorously? You know the answer is #2, and the idea that other countries might do the same thing should not be a surprise. It appears the US administration has fallen into the trap of believing the shallowest version of its own propaganda about other countries, and assuming that Iran was just like Iraq under Saddam Hussein but with slightly different outfits.

The Iranian strategy is basically Mohammed Ali's Rope-a-dope: absorb punishment administered at exhausting cost (very expensive munitions with limited stocks) while spending relatively little of their own (dirt cheap drones with small payloads but effective targeting, continually degrading the aggressor's radar visibility and military infrastructure). The one limited ground incursion so far (ostensibly to rescue an airman, but almost certainly a cover for something else) resulted in the loss of multiple heavy transport aircraft, helicopters, and drones at a cost of hundred$ of million$.