The reason people think only 10,000 Ukrainian civilians have been killed is that is lowball number the UN made up to not offend and anger Russia and China.

It is estimated that 25,000-75,000 Ukrainian civilians have been killed just in Mariupol and surrounding areas.

percentage wise, Absolutely yes. Ukraine is 40mil.

If the current rate was sustained in the Ukraine/russia, we would have seen at least 400k death rates. The estimates are 10-20x less. (between 10 and 20k)

You lost the plot, when even a goon like Putin is starting to look more human and conducting a massive war with less civilian casualties.