If you are only exposed to points of view that you already agree with, over time it's easy to forget that some people have other points of view (which are actually not always completely ridiculous, despite what you may have heard). Note that rage bait does not count as a divergent point of view; it's almost always a cherry-picked caricature, not anything close to a good faith representation.
This might not sound like such a big deal, but do that for billions of individuals and you have the perfect recipe for the political polarization we are currently enjoying.
There was always this curve where a forum would be fun because it was a small group of likeminded individuals. And as it got larger, more trolls came in, more newbies with different interests, and others that might not have shared the same cultural mentality that started that forum. And the forum would begin to shed its original members who draw the crowd. Then what’s left is people who have less interest in the community spirit. And that forum starts to shrink again as more people become disinterested and more infighting happens.
Good moderation can help but nonetheless I’ve seen this happen across dozens of forums. In IRC channels, newsgroups and so on too. So it’s not even a phenomena specific to HTTP message boards. Some communities even have a terms for it like “the eternal September”.
To be clear, this is a separate problem to the addictive design of modern platforms. That’s a whole other level negativity. But people seem to forget that the internet could be a cesspit even before Zuckerberg poisoned the well.
When I have experimented with banning these sites, I have felt a positive boost in my mental wellbeing, where I go back to being bored, which is great and leads to me doing more focused activities like reading more. I just don't know how to solve the "head in the sand" issue. This site has legitimately helped me in my career for example. I think I will land on a middle ground somewhere will be the ultimate answer, like catching up once per week or something.
Likewise with Reddit you can append .rss to get a feed
/s