I know from experience that comments on GlassDoor usually tend to err on the side of caution because people are afraid that saying too much will reveal too much of them. I've seen it first hand, having worked at a company owned by a german game developer that was having some major issues. Not once did I see anything untrue or misleading on GlassDoor, but had probably 2-3 things I could add to their posts.

In the meantime, you end up reading posts like these from people who would rather think that companies don't just suck. It's really annoying, because it's not as if you can reveal the whole situation to people just to prove that their "No, no, companies wouldn't just act like that / be so mismanaged".