From what I understand, people in russia are noticing that no one is coming back or coming back without legs or arms or dead. Obviously the same in Ukraine. However russian soldiers don't see their country unfairly attacked so they don't have the drive to enlist other than the corrupt government forcing them in clearly evil ways like just going to your house and literally taking you. On the other hand, you got the Ukraninans who, on the very first days of the war would make and use Molotov cocktails. They see an asshole country destroying theirs and their way of life. So they got everything to lose. That's why they come back. Plus men of fighting age are not allowed to leave. Most of the world see how russia's asshole guy, little pipiputin is killing innocent people. As you might understand, most of the world has most of the people who live in the world, and they got something to lose. The world has their future to lose if russia starts WW3 or if they start using nukes. This is why russia is loosing soldiers and Ukraine keeps getting more and better trained ones.

At least that's what I understand. It might be that the world wants to become a slave to cancer baldy pipiputin. There are people like that. Would you like to be a servant of a guy dying from cancer who is killing kids?