Improve timely communication. Inform applicants of their status promptly and don't make them contact the company multiple times about interviews or hiring decisions.
Customers see how managers and leadership place unearned blame on employees when it should be placed on the company's backwards work practices. Take accountability for your failings.
They could start by expending any sort of effort on training and developing their employees. They could also be an advocate for their employees, who typically receive no direction when assigned to tasks.
Most coworkers are trying their best given the resources and direction provided to them. We could work better if managers viewed us a team and not disposable labor to be exploited as they see fit.
The company pays well below market rates because they primarily hire recent graduates. Their rationale is that these individuals have less experience so should be paid less. However, some people receive robust training while in school. Pay them accordingly.
Success at the company depends entirely on whether management teams favor you, and not at all on an employee's performance or production. Start by allowing the path to success for every employee to be based on factors other than favoritism.