I think while some of this may be people being people (i.e. tendency to only discuss issues/problems vs accomplishments/solutions), I think there’s also a technical element to it as well in Lemmy’s case.

Up to the latest release of Lemmy (as of writing this is v0.19.4), admins couldn’t adjust the default sort setting, which was Active. Read the docs on the sort setting and Active does what it says, surfaces those posts with recent commenting activity (taking into account score as well).

So you get this unfortunate mix of: people gravitate to discussing negative stuff, people tend not to change default settings (since despite defaults being Active, we can change these if so inclined), and the default sort settings surface whatever is being most discussed/commented on, resulting in this sort of negativity feedback loop you’ve observed.

I noticed and posted about this a few months ago, have tried to upvote and comment on less negatively-focused posts occasionally, but I think this may be an interesting example of a small scale systemic issue as it takes more of us doing similar to address what’s being encountered. However, as more instances update to v0.19.4, I’ll be interested in seeing if admins decide to switch away from the Active sort setting to try to address this in their own way.

I don’t know what sort setting may be better for instances to run with instead, but I’m glad they now have the option. In the meantime I think it’s worth reminding people that they currently have the option to change their default sort settings to something different to try to see different kinds of posts. Personally I switch between New and Scaled to see a variety of posts beyond many of the regular doom and gloom posts.