I've experienced this almost verbatim - put up a factual (at least from my view) account of working with a previous employer, a "warts and all" review. Next week I see about ten 5-star reviews each with a single sentence something like "This is a great place to work!".

However, when searching out the low-down on a potential new employer, I only read the one and two star reviews - if they're pretty spurious then I feel more comfortable taking a role there. If however the poor reviews contain lots of pretty specific complaints, I find them more believable that the single sentence "everything is awesome here" style reviews.