In hindsight did you want to be a pilot, or an airline pilot?
Maybe you aren't at the right airline for you. Problem is, there isn't much choice at the moment. I still love the job and I wouldn't want to do anything else. Glass is half full for me. Yes these are tough times and working conditions vary immensely. I'd stick it out for now if I were you until things pick up and you have more options with other airlines. Flying is very much about being current and you may find it hard to get back again if you stop which would be a shame after all of the effort (and expense!) you have put into it.
But if your heart is not in it that's a different matter ...
Good luck
B&B