Losing to Iran?

Of course, America wants and the world would benefit from regime change in Tehran, but that laudable goal was not stated as a war aim and can't be done without bloody armed revolution by the Iranian People or troops on the ground from America and allies that no doubt would lead to hundreds of thousands deaths (at least). It sucks to think the ayatollah regime will survive this conflict and crow that they have "won", but that dreaded outcome is a real possibility.