I can't deny the overabundance of useless tierlists for sure.

I find distro-specific forums tend to have more helpful, less immediately snarky posters.

The linux community on reddit has chilled a lot recently imo, but I suppose it wouldn't seem like it from older posts. Bad rep is hard to clear..

I have a feeling it might also depend on the size of the particular community. I could definitely see a super large community like arch having a much larger amount of bad apples

I'm asking this sincerely, where are you finding all these shitty people? Every time I've needed help with anything Linux related the worst I've gotten back was suggesting I read the distro's wiki or some mild snark. Most people have been understanding and helpful. Perhaps I've been lucky.