Absolutely 100% this. I've used them on and off throughout the years. The community became toxic, so I took my question to other platforms like Reddit (they became toxic as well) and elsewhere.

Mind you, while I'm a relative nobody in terms of open source, I've written everything from emulators and game engines in C++ to enterprise apps in PHP, Java, Ruby, etc.

The consistent issues I've encountered are holes in documentation, specifically related to undocumented behavior, and in the few cases I've asked about this on SO, I received either no response and downvotes, or negative responses dismissing my questions and downvotes. Early on I thought it was me. What I found out was that it wasn't. Due to the toxic responses, I wasn't about to contribute back, so I just stopped contributing, and only clicked on an SO result if it popped up on Google, and hit the back button if folks were super negative and didn't answer the question.

Later on, most of my answers actually have come from Github,and 95% of the time, my issues were legitimate ones that would've been mentioned if a decent number of folks used the framework, library, or language in question.

I think the tl;dr of this is this: If you can't provide a positive contribution on ANY social media platform like Stack Overflow, Reddit, Github, etc. Don't speak. Don't vote. Ignore the question. If you happen to know, help out! Contribute! Write documentation! I've done so on more than one occasion (I even built a website around it and made money in the process due to ignorance elsewhere, until I shut it down due to nearly dying), and in every instance I did so, folks were thankful, and it made me thankful that I was able to help them. (the money wasn't a factor in the website I built, I just wanted to help folks that got stuck in the documentation hole I mentioned)

EDIT: because I know a bunch of you folks read Ars Technica and certain other sites. I'll help you out: If you find yourself saying that you are being "pedantic", you are the problem, not the solution. Nitpicking doesn't solve problems, it just dilutes the problem and makes it bigger. If you can't help, think 3 times and also again don't say anything if your advice isn't helpful.