The 7:1 K/D ratio is from...

"The losses of Russians around Avdiivka are colossal. My colleagues and I did the calculations and pulled up our archival records from the beginning of the year," said Dmitry Likhovy, Ukrainian military spokesman.

emphasis mine

~https://www.businessinsider.com/russia-lost-thousands-of-personnel-and-400-tanks-in-avdiivka-2024

Ukrainian forces pulled out, they haven't counted bodies, this is a pretty wild number. I wonder what time frame they're using for their "calculations" and just how much of the fighting in areas around Avdiivka were being included in the numbers?