As-salaamu alaykum, and thank you, all!
Unfortunately, it's hard to walk away from stressful people when you work in the community/volunteer, etc. It's just part of the job. So this was just another topic on how to deal with it. I've learned from my husband (who's a workaholic, volunteeroholic) that you simply cannot take anything too seriously (masha'Allah, he's got thick skin). I don't know if women are necessarily wired that way, when it comes to having thick skin (no offense). We take things too personally and we worry too much about others (it's a rahmah thing, right?).
But he has a point in that you have to plow through the nay-sayers if you have a solid and supported long-term goal in mind.
Btw, I've noticed that most Islamic school teachers have some sort of health problem, and that scares me. Not because I'm afraid I'll be like that, but I'm afraid some of these teachers have literally sacrificed their health for a "greater good," sometimes to the detriment of their own selves or families. SubhanAllah, I'm not at that level, but may Allah reward them abundantly.
Sr. Kathy, you hit the nail on the head. That's what I have to do, trust in Allah when I've done what I can do (my problem is, I don't know when to stop).