Putin does not want to rule the world, he has no interest that he would have the rest of the world population under his control, which already hates him.
No sane guy wants to rule the whole world, especially everyone who still has all the cups in the cupboard knows that he is dead if 90% hates him.
Putin probably wants one thing, that Russia's borders are accepted, no nuclear weapons 1 meter next to the Russian border aimed at Russia and Russia is accepted as an equal partner.
Russia has made this demand to Europe for more than 10 years, Russia was laughed at, this conflict now was provoked, Europe and NATO provoked this war to 99%.
You would have achieved exactly the same if in Mexico missiles against the U.S. would have been set up, only the U.S. would not have sought 10 years of dialogue but Mexico after 1 year at the latest taken for that.