Here is a very short summary which will put into perspective how Russia has done since the heady early days of the Ukraine invasion:

Russian forces have lost an area larger than Denmark since the high-water mark of their invasion of Ukraine in mid-March and gained an area the size of Andorra (one percent of what they have lost) in the last 39 days.

Source: https://www.understandingwar.org/backgrounder/russian-offensive-campaign-assessment-august-24