Without evidence to support these claims, I feel like what you’ve said just sounds like more fear-stoking.

It’s also likely that Reddit has become more international, and the world at large leans more left than the current US. Couple that with mostly-US news stories, and it’s not surprising to me that Reddit is often quite angry.

Without evidence to support accusations to widespread government propaganda, I’m going to have to go with the simpler of the two options.