I would pack it in and go back to your old job. At your stage you should be able to see past the BS aspects of the job and still be looking at it through rose tinted spectacles. You're not. If you feel like this after a few months you will absolutely loathe it after 3 years. And you will sit in your seat all day moaning about it which will drag everyone else down with you. FO's who are not happy with their lot when they have only been doing the job for ten minutes is something I see frequently. And they are the cause of some of the worst days out imaginable. Go back to your old job, fly for fun and let someone who would appreciate the job have a crack at it.