Saddam offered a ceasefire, not peace, because he thought that he was winning. When Iran managed to push back they demanded that Saddam be removed before any peace talks could take place.Iran's regime current behavior is copy of their behavior during Iran-Iraq war. In the beginning of the war Saddam offered them to end it. But they refused and asked totally unrealistic demands.
As result for continued for another 8 years which led to 300,000 Iranian and 200,000 Iraqi deaths. In the end Iran agreed to same terms which were offered in the beginning.
This regime is genocidal and suicidal in same time.
Don't forget US/Israel played both parts delivering weapons to both Iraq and Iran. The aim was to let them both bleed out and die slowly.
So when Iran demands the removal of a leader it is uncalled for but when the US and Israel make the same demands, it is justified. That, my friend, is a imperialistic mindset. White man's privilege.
You have decapitated the top brass and still no regime change. Now what?