I generally agree with everything you're saying, but healthy criticism is course-correction. As an example: if someone is attempting to trample all over my boundaries (whether or not it is unbeknownst to them) it would be better for me to speak up and point it out to them so they can correct themselves for future interactions. They could drive off many potential friends, colleagues, a spouse, etc. if they aren't aware of what they're doing.

Back to your point though: there is way too much negativity within society. I have to refrain (it's painful!) from writing an essay about the nature of humanity and pain's self-evident omnipresence in this post. Anyway, I applaud you for taking a step in the most sane direction, and I admire the fact that you will do this despite it appearing as insanity to others.

There's a big difference between skepticism and cynicism. It is difficult to avoid falling into pits of cynicism if you're the skeptical type like me, and because of that I wish you luck with your resolution! You seem like the type who has a strong community -- use that to your advantage. It's the best way to keep yourself on course!