foswillruletheworld pretty much covered it. Salary going down each month, FO is just a Captains slave, so many stupid military attitudes, captains that think they are Gods gift to aviation but in reality are rather crap and need to be watched like a hawk, back stabbing, probably no chance of an upgrade as you will always be second after a local, not the best as a commuter, lack of or no communication from the office and management, arriving for a flight only to find your schedule has been changed and no one tells you. And the list goes on and on. I imagine its what aviation was like 60 years ago.
Definitely not what it says on the tin.