XD40...Dude....a little too shrill. You're letting your emotions get in the way of rational discussion. I understand your argument, but you didn't get into teaching to have people empathize with you. At least, I hope not.
Yes, teaching is a tough profession, but remember why you entered into it in the first place.
It's still worth it...at least I think so. And really, that's all that matters, isn't it?