Conundrum

I hate where I work; childcare facilities in general, as well as specifically where I am now, as it draws stupid lazy people and this is a large source of frustration for me. One reason for this is that I have a strong work ethic, and do not believe in being lazy at my job. I am being paid, therefore they should receive my best every day. If I can not give my best, I stay home. Another is the very simple fact that we are teachers. We are teaching the next generation of children to be productive members of society. It is not the place to be lazy. My conundrum is this; do I find a job elsewhere, in another field, abandoning the children I have been teaching, as well as all the others to this fetid pool of laziness? Or do I try to take the supervisors position away from the useless woman who is barely able to perform in the position at the moment? I have it on good authority that I may well have a chance at the position. On one hand, it would look great on my resume that two schools in a row promoted me to supervisor. On the other, I failed once at this job. Am I really ready to do it again? In a place that is so obviously falling apart, at that. It would be great if I could turn the school around, but I have never been a leader. From kindergarten to 0ac, I was the kick around kid. Now I am timid in the face of confrontation, or at times, far too aggressive. I do not know how to influence people in a positive manner, as any time I have tried I've been met with anger, and even hatred. Again, though, I wonder if that is a byproduct of the profession. Are the stupid, lazy people just angry with me because they are smart enough to know they are stupid and lazy? Do I sound like a complete asshole yet?