Well ... attackers always have high casualty rates, especially when they have no armor, no air and were sent over flat terrain during an artillery war.
Significantly many of those casualties were from the 155th Naval Infantry Brigade - ‘elite’ Russian troops. 155th NI now wiped out, soon to be reborn with newly mobilized & untrained conscripts.
Sad about the 155th Naval Brigade. They traveled so far from their home in Vladivostok only to die in Ukraine and for what? So Putin and his oligarch friends could get more oil and gas.
I feel bad for these men who really were good soldiers for their country and now no one will remember them except for their widows and orphan children.