Nice strawman. Specifically what I highlighted in my comment were:
Describing this guy as a "journalist"
Wildly misrepresenting the reason for his imprisonment
Inserting one-sided commentary on the progress of the war overall into an article that has nothing to do with "How well is the war going?"
All of those, I would say, represent propaganda, because none of them would have any business whatsoever in the article if it were an attempt at honest journalism.
But yes, in addition, I would say that it's propaganda to say that Ukraine is losing. If I had to point to a single objective assessment of how the war is going, it'd be this map (from this article). There's a bunch of Ukrainian territory captured by Russia since the start of the war, and a bunch of territory recaptured by Ukraine. Ukraine could still "win" the war in the end, or they could "lose." But for the Russians to have been fighting for almost 2 years and only have rolled from 0-150 km into Ukraine at the nearest and furthest points of the border makes it hard for me to say the Ukrainians are "losing" the war.
(Edit: Here's the BBC article quoted in the OP article)