One challenge is that even in sucky workplaces, there always seem to be champions that will tell you how great it is. In part because it's a hard life focusing on how your job sucks and many people get good at being outwardly optimistic.
That said, it would be nice to see more authenticity than what mostly gets posted in the hiring thread, and on company websites. I'm sure we each have our own criteria of what kind of info we'd like to see, but I rarely see anything more than the usual bromides.
Honestly, I've found glassdoor to be pretty good if you've had a few jobs before. It's pretty easy to find which reviews to discard, and read between the lines for red flags even in places that are relatively highly rated.