Russia has employed lying in propaganda in and out of the context of war since the beginning and before it. I don't see that as any meaningful measure. You have to look for the facts and indications beyond the propaganda without being distracted by the propaganda or trying to meta-analyze it. Both sides will try to make their spins, and try to exaggerate and paint to the maximum of their ability in their respective environments.
For Russia, smoke screening is part of its narratives and political defense. I haven't noticed such systematic lying beyond what I would expect in wartime propaganda from Ukraine.
Press landscape is its own share of issues and part of what makes propaganda so important, effective, and necessary.
Ukraine has losses, but, with its limited resources, Ukraine is also very successful in defending and in striking into Russia. And to retain support, they have to utilize propaganda/publicity, to stay in the public and international eye, and continue to receive support. And they're very effective in that too.