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.

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.