The salary will not change for as long as you work there, no real bonuses, nothing to keep you going.
The work environment is stiff, you are discouraged when it comes to socializing, you are viewed as a threat by your managers if you come with ideas to improve things.
Eventually, if you keep trying, your manager will do his best to get rid of you.
The appraisal process is just a bad joke, the manager's pets will always get great results, while the people that really do something will be frustrated by the results.