Hexbear is good for shitposting, but where should I go if I don't want to do that?

Like what if I want help formulating counterarguments to liberal/conservative stuff that I see elsewhere, and/or I want to discuss leftist ideas/stances that feel to me like they're a bit weak and need shoring up, and/or I want to clarify/examine my own more problematic ideas?

I mean, I guess I could post to librehab, but I've already authored the most recent three posts there and I'm starting to feel like, you know, that guy.