The positive reviews are definitely coerced and written by Managers. Unfortunately all of the negative reviews are true. Leadership is allowed to lie, manipulate and gossip about their employees. A lot of work is done sneaking around to catch anyone doing something wrong, rather than coaching and helping people succeed.
HR spends an extraordinary amount of time firing people. There is absolutely no recourse or action taken when an employee is treated unfairly by a manager. Lot's of backstabbing and gossiping about others. People are beaten down and unmotivated to stay in this toxic environment.