Ukraine doesn't claim a 6:1 ratio overall. Only in certain parts of the front line during certain periods of fighting is it so lopsided, such as the recent Russian attempts to retake Kursk or the early assaults on Bakhmut and Vulhedar.

An optimistic estimate for the overall war would be more like 2.5 to 1, but realistically it's probably lower.

Equipment kills are another story.

Russia is losing 1000+ a day. I get thee is propaganda, but it would be news is Ukraine was losing 400/day.

The rate of Russian advance (that is, extremely slow) would imply the kill rations are very high in Ukraine's favor