Given this, easy-to-digest messages are easily amplified through social media and every complex detail is withered to nothing. This is why I stopped using Lemmy. The larger communities (read: the only ones that get any posts) ended up being a worse echo-chamber than every other platform due to people repeating the same simple concepts ad nauseam.
I suppose it may be harder to control since a central authority can’t publish anything they want.
Very interesting shift in media consumption, and it may help explain the sensational/disconnected headlines.
If topics are openly discussed, untrue narratives generally dissolve. What better tool do we have?
Special interest groups have been around forever (see Cryptome's article "The Gentleperson's Guide to Forum Spies" which outlines some useful tactics). These groups still exist (eg: the JIDF, or ShareBlue in whatever name it's calling itself these days, to name a couple)
Platforms themselves also engage in tactics such as shadowbanning its users (Reddit and Twitter were both in the news for this at least a few times), or using a curation algorithm to show you what it thinks is relevant (Facebook's wall, or YouTube comments/chat being shuffled rather than showing activity chronologically to discourage discussion and to more easily hide censored comments). The idea that social media platforms are not one-way is an illusion
In short, the people who you're talking to are not always real people. Some of the discussions you're trying to have might be getting silenced without you knowing. And the facts you read from a given source could have been invented. The Fediverse isn't exempt from these problems
First, nobody cares what anybody on the Fediverse says. It's tiny. It's pinnacle "app", Mastodon, is losing lots of MAU every single day and is now below 1M MAU. Besides being tiny, it's scattered and discovery and search do not work. How can this mess possibly counter propaganda?
Second, whilst the Fediverse may not have sophisticated algorithms, it very much has censorship and typically way more than traditional social networks. It's basically a collection of far-left misfits that engage in constant defederation wars. You can't even post a photo of a meal because somebody will be "triggered".
I can understand how you had this experience with the fediverse, but it has gotten better for me over the years. Many big instances are wokist with all kinds of rules such as banning hate speech, but you have many such as noauthority.social that are explicitly free speech. I have been running my own instance for years. People can block me, but nobody can kick me off.