It's not Netanyahu's fault that Trump fell for it.
America was 0-2 in the MidEast regime change business, before Iran.
Any claim of easy-peasy regime change should have been met with much skepticism.
Cutting off the head of the snake in Iran won't work because Iran is an Islamic Revolutionary starfish. Any pieces that are cut-off will re-grow if the entire starfish is not killed.
This is why Congress has War Powers, and not the President. But, DC, uses the US Constitution as a cocktail napkin.