If it a question of time-area, then it did not go well for Ruzzia, considering they have lost a full year worth of land in the couple of weeks of the Kursk offensive.

The data disproves you hypothesis of Ukraine seeing a feature in Ukrainians being killed - I mean, if it even if such unsubstantiated comment has to be disproven.. The average age in the Ukrainian army is very high compared to others because the government is trying to have a future for the country.

Ukraine is not focused on land, they are focusing in asymmetric war. It is not possible, as of now, to hold all the land at no-matter-the-price, but it is possible to make it economically and politically not worth it. This is how smaller countries defend themselves - not only Ukraine.