Whereas the Bolsheviks took very little time to effectively surrender to Germany and its allies only half a year before Germany itself surrendered to the former allies of Russia. (Thus freeing up the returning army to wage several years of civil war amongst various parts of itself.) Every option sucked here, much like in every other case during WWI.

And yes, it’s absolutely true that little good usually comes from violently overthrowing a dictator. The best results are obtained from the dictator peacefully resigning after a promise of amnesty for them and their inner circle, however crass and unfair that sounds. Generally speaking, it’s not very helpful to put people in power before a choice of either losing everything or attempting to maintain their hold on that power by whatever means necessary: it’s going to be the second one every time.