It's interesting reading this because I've recently been trying to wean myself off Reddit for the similar reasons, and one of the communities I have used to replace it has been HN -- because (in my experience) HN generally tends to avoid the issues in the way discussions play out characterised by this article.

It's worth remembering that a forum completely devoid of 'bad arguments' is realistically never going to happen. I guess (as the author notes) it's a matter of 'personal thresholds'.