Frosty
Logical and sensible but turns women gay
I don't know why people bother trying to understand if the morale is high or low. Our guess is as good as any really. I also don't think it matters so much in modern warfare. The technology is so high the man behind the machine hardly matters unless they are completely demoralized or something.
I think morale is an issue in the Donbass:
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The soldiers are not yet getting the new weapons, and it is a slow, attritional fight, not marked by technology but by artillery. Flesh and bone against iron and steel. In that sense we haven't moved much in the last 100 years. Given the rate of deaths too (and those won't be caused by nice neat bullet wounds), and crucially the lack of rotation, then morale there would suffer.
Also the Battle for the Donbass has been going on for (I think) 76 days, longer than the Battle of Kursk and heading towards Monte Cassino and Anzio territory.
Morale is likely much higher on other fronts.