Complete and utter LACK of loyalty. Cross someone, ANYONE, and you're gone. The "good old boy" culture, where someone, even a low-level employee, can get another employee fired just because they don't like them, needs to end.
Lack of promotional opportunities, despite promises to the contrary
Compensation program when switching programs. losing all accrued MERIT increases, is unfair, and forces long-term employees to start over at a MUCH lower rate of pay.