After all this mobilization preparation and diplomatic groundwork, there's no way the US would back down now.
Larijani is effectively held hostage because his daughter lives in the United States. He no longer appears to be merely inactive; he seems to be deliberately betraying Iran.
Why would the Iranian government appoint someone whose child resides in an enemy country to a key position? By permitting this, Khamenei himself is effectively committing an act of betrayal. It's no wonder Iran keeps suffering defeat.