> Wasn't it formed when the mod got called out in a different sub?
Most subreddits gets formed by someone who's tired of the existing subs, gets into one too many arguments with a mod, and thinks they can do better. I don't know anything about these specific subs but I wouldn't see "this guy formed this sub after getting called out by a mod in another sub" as any kind of red flag.
The concern is understandable, I suppose. It's just a convenient way to see clips from both sides of the conflict, and it's the best source for combat footage clips anywhere. I do have a working brain and can use it to identify when people have a polemic. I prefer it to telegram, which is the alternative. The comments are indeed... uh, very strident in their support for either side. So I'm not sure if it's "propaganda" so much as people regurgitating propaganda at each other at full volume.
Anyway, it's a war. Propaganda is essentially impossible to avoid without ignoring the topic entirely. Still, it's what we have to work with. And to be clear my sympathies lie with the ukrainian people.
Propaganda is big on mixing just enough 'both sides' to lend legitimacy. Again, if I'm remembering correctly this dude was called out on another sub and ended up creating this one specifically to continue his propaganda narrative. There's a lot better subs to work with on Reddit than that sub
/r/UkraineRussiaReport is basically the only forum on the whole site where anything that isn't 100% cheerleading for Ukraine is allowed to be posted. It seems like pro-Russian propaganda only in contrast to the rest of Reddit where the pro-Ukraine bias is actively enforced by the mods. You say the creator was "called out" on other subs which is why he created the alternative. But that just lends legitimacy to the sub, if you're interested in anything approaching an unbiased source of information.