They were already a demographic black hole (well below replacement birthrates). An entire generation of Ukrainian men are wounded or dead. Millions have left the country and are never coming back after finding new jobs, partners, etc. Their future is dire if they "win"; the whole situation is just cynical and sad.
Yeah it is sad. It is unfortunate the war was dropped on them. At least they've put up one hell of a good fight for their country and freedom. Inspiration for the world; I think they're rebuild pretty strong.