find a position with T&C's you're looking for and change to that !
Yes, well that is sort of the point of the thread isn't it? The companies with conditions worth looking at get fewer and fewer. This notion that you can do a few dog years at pay-to-fly Chav Air and then leap over to Gold & Honey Airways until you retire is a mirage waved in your face by flight schools.
By the time you are working 900 hrs a year for no money, all the companies you were hoping to switch to are just as bad. With the help of yourself.