You kinda have to assume some level of bullshit to begin with or otherwise you end up far from reality.
Remember that the first victim of war is truth.
I think it’s reasonable to assume that Ukrainians try to paint a rosier picture of their situation than reality would suggest.
And so do Russians, in their media.
If I want to conclude that all politicians lie (and therefore imply that it's okay that Trump and Putin lie every chance given) I just can't use my own expactations that everybody lies as reasoning, that's not how logic works.
I can find a lot of straight up verifiable lies by Trump and Putin - if you can't do that easily for Zelensky, their relation to the truth is clearly not the same.
Tldr (not for you personally but for jsp in general): stop spouting russian propaganda, Putin (and his buddy Trump) lie a lot. Look at independent sources, look at data, form your own opinion. if your opinion is based on your facebook feed, fox news shows that they themselves claim are lies or tirads from your racist uncle, put it in the trash.