I’m not sure of better alternatives, only different. Mastodon or even Threads might be your solution. I also took a look at the comment history to get a sense of what you mean and I think I get it since I also get a fair share of negative interactions.
I think it’s actually because of Lemmy’s size that you get some pretty fringe views on here. Heck, if anything, the diversity you seek might mostly be all the views in-between that get drown out by the loudest fringe views. I’m sure there plenty of us lurking, since it’s so exhausting engaging with lemmings at times. I’m by no means a moderate, but simply trying to defend a news source as legitimate can feel like a disheartening chore.
Anyway, I don’t really know where to go for that and if you find out, I’d love to know. I don’t necessarily agree with you on your views, whatever they may be, but I certainly can agree that we need a little wider range of views (and perhaps a bit more civility when someone expresses a different perspective).