The positivity can be toxic. Like any company there are complaints but the unspoken rule is to vent to your coworkers instead of acknowledging it outright with superiors. When employees do reach out I have seen them belittled or ignored, that is the main reason for this Glassdoor review. The overall culture mixed with this experience sends a message of you should be happy just to be here, and results in exploitation. Seeing opportunities for improvement or expressing concern does not equivocate to ungratefulness.