That’s not to say that we should never find or take a new job. But, before I ever tell anyone to find a new job, I encourage them to earnestly pray about any decision before they make it. They need to discover what it is that God wants them to do. I remind them that they are at their current job for a reason. They may not know what that reason is, but there is a reason. Of course, God may be directing them elsewhere and that is fine, but they need to spend time seeking God's will before making a move.
Sometimes I meet people who simply work for awful people and they probably should leave, but I'm a big fan of praying for the people you are working for. More importantly, pray for yourself that you would be the person God wants you to be. Positive people are much more likely to turn their ideas into positive behavior. Positive behavior, in turn, does change circumstances, and nearly always for the better.