The worst online fora for support are for 'for profit' companies.

I had one where I was trying to get mongosh (or similar, I think they have had multiple shells) to change some print behavior I had multiple users coming in and giving me incorrect answers to a different question that was easily found in the docs and then begging me to mark the question as solved with them as the respondent and they were always written as though I was some sort of child-king that needed to be kow-towed to.

This kind of gamification of support fora incentivises responding rather than responding with correct answers.

Conversely Linux fora always have people who are at best polite and largely know their shit. They will help you hunt down the problem until the point where you hit that it's actually a firmware bug and you gain skills along the way.

The use of the Latin plural fora really resonates. It's like they are their own class of organism evolving in a digital terrarium.