And it's interesting that you've no appreciation of just why the Central Powers "negotiated" a peace with Boshie Russia. Peace on the eastern front allowed the CP to shift troops to the western front and try to win the war.
Brest-Litovsk was a peace of CP convenience only. The CP essentially dictated the terms and, when the Bolshies got uppity, was more than willing to start up the war again until the Bolshies crawled back to the "negotiations". Any accommodation with the Bolsheviks was going to be temporary while the CP dealt with more pressing issues like the UK, France, Italy, and the USA.
A Germany which wins WW1 is going to eventually deal with a USSR or whatever Russian state the Bolsheviks able to fashion because such a state is a threat to German satellites in Eastern Europe. And, unlike the OTL Entente powers which fought the Bolsheviks, a victorious Germany isn't going to be too squeamish to finish the job.
I don't buy this. Do you really think a White Russia would just smile and forget about Ukraine (or the other lost areas)?