Its a churn and burn culture, they don't have the market share they used to and continue to put so much pressure on employees to continue to increase their performance. In my opinion Management wants you to feel like you are failing so you push harder and harder. Also, if you set out the measurables required for the job and accounted time to them there is no way you could get it all done even working 50 hours a week (all while ignoring customers requests for help).