It's full of people who can't be bothered to do even the most trivial investigation into their own damn bugs - the same trivial "I didn't configure it lol" and "I have no idea what I'm doing, nor interest in developing one, fix my thing for me plz" bugs that the site already has a dozen answers for. It stays that way because volunteer moderators don't want to wade through sewage all day. So it goes.

The topic-specific SE sites are often better; Emacs.SE, just off the top, is consistently of very high quality, with maintainers of several high-profile packages and Emacs itself regularly active there. But I abandoned any attempt to participate on SO proper years ago, and rarely even check there except on the off chance that some weird exception has an obvious cause that'll save me a source dive on a library or some similar large investment of time.