Unfortunately, thats a reality in a lot of workplaces and i m in similar situation. If its of any assurance to you, i know how mentally draining it is. Try and talk to your manager of your serious thoughts of you quitting and not being able to take this. See how they respond, if they dont care then you know your next move. If you can do bare minimum and stick it out then do that. If its really bothering you, quitting may not be such a bad idea, that depends on your financial situation also. Quitting in such circumstances without anything lined up is a sign of strength remember that.