Well... he isn't wrong. It is indeed completely irrational to fight 17 months, lose hundred thousand+ soldiers, most of your somewhat modern equipment and damage your economy for decades to come while proving to be incapable of even remotely reaching the goals set for just a 3-day-long invasion. And Russia should finally pack up, go home and end this shit show.
And now let's wait for his brilliant plan to actually get Russia to wake up from their insane fever dream and delusion of grandeur... That is his plan, isn't it? *cough*