Trump assumed a walk in the park Venezuela redeux, followed by regime change.
He gravely miscalculated.
Iran not losing is how they win -- the ability of the regime (a horrible outfit indeed) to survive and drag out Trump's involvement -- knowing the growing costs, lack of achieving objectives, and growing dissent among Americans -- gives Iran more leverage to dictate Trump's exit.
As may of us posted as the ceasefire, it better for us to cut our losses vs escalation. Neither option is a good one. And we have no allies.