The management is awful, overtime is mandatory and often last minute, and HR is not interested in actually investigating anything. If you go to HR with an issue, their first response will be to go back to management and then stick you in a meeting with them and management with absolutely no effort spent into checking with any other witnesses. Management is also the ones who write the reports for HR, so they can and will neglect to include any details they find inconvenient such as if they are the ones who made a bad call.