It sounds like you've had a discouraging day, or month, or year. I'll bet that's an experience every thinking adult has had, but maybe everything isn't as dark as it looks to you right now. I've got a few lovely, lovely 'rules' for mental health and happiness that have served me well in my adult life:
1. I've learned that other people's choices, or any actual situation, don't "make" me happy or unhappy. It's the thoughts I HAVE about those choices that keep me suffering, and if I know that, then I have a great deal of choice about what I want to think. I was taught from the cradle that I "make" Mommy happy, "make" Daddy angry, etc. Probably most children throughout human history grew up being taught that they are somehow responsible for other people's moods, especially our own families'. It is important to know that my choices ripple through other people's lives, but believing I must behave a certain way for another person's happiness is actually a tragic situation. That belief can take away spontaneity, joy, and personal power.
2. I watch my pronouns. I try to be aware of, and avoid, the "editorial we" or "royal we" unless I'm clear that I'm choosing that for some specific purpose. In other words, I don't say 'we' if I actually mean 'I' or 'you' or 'they.' Sweeping people up into groups is seldom accurate or particularly useful – 'we' are simply not that homogenous. (And yes, 'we' collectively have a very hard time avoiding this manner of expressing 'our'selves.)
3. Another pronoun gaffe that complicates things when I'm not looking is to think in terms of "us and them." "Us" are the ones with the right values, morals, education, upbringing, etc., and "them" are the ones who missed the boat. "Us" is friend and "them" is enemy. "They" are ruining the world for the rest of "us." This thinking is subtle and insidious and can do tremendous harm at personal, social, and national levels.
4. I seriously avoid playing "Ain't it Awful" – a game people play that keeps the participants feeling angry, helpless and overwhelmed. Gossip is one form of this popular game. It does absolutely no good to fuss and worry about what "they" are doing. And it's entirely possible that some really great stuff is also happening, or will happen as a result of what "we" are learning now.
5. This one's hard for me, and I have to keep working at it. But I avoid being in other people's business – assuming I know why or how they made the choices that I so disagree with. I have no control over anyone's decisions but my own, so I figure I do well to be as conscious of what I'm doing as possible. Responding to mamapedia requests gives me lots of practice in this, but even here, I slip, early and often.
6. The Good Old Days mostly weren't. Some things were better, at least from some people's perspective. Some things were much, much worse, especially from other people's perspectives. I was raised by an authoritarian mother who permitted no argument. My childhood was absolutely miserable. But it also got me to look closely at child-rearing and make better choices for my own daughter. I wouldn't be half the person I am now if my childhood had been happy. Everything brings trade-offs.
7. I don't watch commercial television. I do sneak a peek every once in awhile to remind me why I don't. That medium is designed to shamelessly grab the public by their eyeballs, hearts, and guts (not to mention pocketbooks) and hang on relentlessly. It's as irresistible as watching a car wreck, and about as uplifting. My mother, bless her heart, watches endless drivel and is convinced society has died and gone to hell.
8. My spiritual life gets regular maintenance. Very, very important.
The society I hang out with are actually pretty positive, ethical, hopeful, ambitious, and dedicated. Many of my circle are young parents, working to build a better world for their children's generation. So I keep my focus there!
You are in a position where so many influences cross, D. – child care, wow, you see it all. Some of it must be infuriating or despair-inducing. Don't you also see signs of hope and growth and positive change? In your position, you might be able to provide some of those: How about including on your weekly calendar, or a send-home leaflet, an uplifting quote, a parenting tip, an inspiring story? Make your mark! I wish you the best.