The numbers tell the story. The Russian field armies have lost at least 411 tanks, fighting vehicles and artillery pieces trying, and failing, to capture Avdiivka. The Ukrainian brigades garrisoning Avdiivka—including the 110th, 57th and 47th Mechanized and the 1st Tank—have lost just 30 pieces of heavy equipment.
Russian casualties—dead and maimed—exceed 13,000 in just this one sector. Ukraine’s own casualties likely have been much lighter. Perhaps a few thousand.
https://www.forbes.com/sites/davidaxe/2023/12/30/killing-russians-by-the-truckload-around-avdiivka-ukraines-m-2-fighting-vehicles-are-showing-how-russia-loses-and-ukraine-wins/