The km per soldier KIA ratio is not winning, so few km so many dead Russians.
I don't bother to 'analyze' battlefield data, don't have the competence to do so anyway. But many analysts say Russia's goal is to attrition the army and deplete their weapons. It's taken much longer to finish than these guys anticipated but they think "very soon" there will be a sudden collapse for Ukraine. Some Ukrainians claim they can keep this going to at least 2034.
For Russia biased commentary I like this fella. He offers battlefield analysis frequently. I don't really read those parts though and I can't interpret it anyway, but the other commentary looks impressive to me. He quotes Ukie sources a lot on the battlefield analysis.
https://simplicius76.substack.com/