Senior management are deceitful and canniving
Promotions are based on whether or not you're close friends with senior management, not on whether or not you're qualified
Don't abide by employment law, will make you work 8 days out of 10 (11 hour shifts)
Pressure you to make sales even though you don't get paid for them
If you make a mistake, management can (have done to me) used you as an example to the entire floor without asking permission from yourself
Flawed incentive structure, people getting paid more even though they do less