Yeah it’s hard to say. Fark? HackerNews? Bluesky? Tildes? You’ll just have to try a bunch and see what catches on with you. You’re welcome to try Lemmy again anytime, so who’s to stop you from a break from it?
I’ve been saying for a year, Lemmy and the Fediverse is specifically designed to be like a series of echochambers, since the community, the moderation and local userbase are designed all around that. Ultimately, you have the freedom to choose who and what to allow and block yourself.
Personally I think you are subjecting yourself to grief by interacting with hexbear and lemmygrad but I’m not here to scold or police what you choose to do.
I think one major difference that can make your experience negative is that posts on Reddit can’t show below zero, and people here use the downvote button more often because they have strong feelings on a topic. In my experience on controversial topics you would have various threads where both sides of an argument receive downvotes which is a sign there are diverse perspectives. You just have to live with and not be bothered by a negative score, it means nothing. Some examples:
Israel vs. Palestine narratives (Lemmy overall leans a little more toward Palestine but I’ve seen either get downvoted depending on community over the months)
pro-Biden vs anti-Biden (this is a very controversial one and sure some of it is anti-American propaganda and “both sides are the same”-type of sealioning, still both perspectives get downvoted).
Ukraine (this one is easy, you’re either on a community under .ml moderation or not, which determines the overall narrative)
This is all to say that the best way to get ‘diverse’ opinions on Lemmy is to hop around various communities, brace yourself for downvotes and just try to be genuine about it. For non-controversial content we all gotta do our part, speaking of which I haven’t posted much OC lately so I’ll get onto that soon in a couple days.