Even at 4K to 6K...that would be humiliating to the Russian armed forces.
11k the first 2 weeks? They haven’t even started urban fighting yet. Russian forces are turning Kiev into the next Stalingrad. There will be snipers and antitank units waiting in each building, underneath concealed rubble. The newest technology to come out of this is modified off the shelf drones that are capable of dropping Molotov cocktails.
I’m predicting the Russian death toll will be 75k by mid-April. Those mobile cremation trailers the Russian forces brought with them are going to be running full tilt.