It’s definitely not a complete nor perfect solution, but I’ve noticed that a number of accounts disproportionately post very negative news links. I’ve started blocking some of those users. It helps break it up a bit. I’m sure I’m missing some news now, but there’s only so many times I can see posts about the world burning up or genocide before browsing lemmy becomes stressful and nihilistic.
So if I see the same negative news story on multiple communities, I’ll click on the user and if they’re blasting negative stories everywhere I just block them. For example, I just blocked silence7@slrpnk.net, not because of any harassment or anything, it’s just that they almost exclusively post political and climate doomsday stuff.
They could just change the rule back. The procedural rules change all the time.