As to uniting the country, in Chinese history, every time when China is united as a whole, people get better life. Once divided, wars come, that is a whole disaster to Chinese people. There is always a force in China to make the country unite, that will make the whole Chinese people's lives better. You see, even EU is uniting European countries, unite brings greater good, though not everyone of 1.4 billion understands it. Sorry, here, we can't let everyone shout his voice out.
As to "I'm pretty happy and hopefully everyone else is too", no I didn't say that. Actually, I'm not that happy, and everyone in China is not that happy. But you have to see what we are worrying about. I have traveled around the country and lived in many cities and in the countryside(I have many relatives there), and I have quite a few friends from Xinjiang and Xizang(Tibet) too. For now, if you don't live in deep mountains, your life quality will be good. Food good, cloth good, water and power supply good, hygiene condition good. But there is still a lot of improvements to go, we don't want merely good, we want fantastic. So we are all worried how to make more money, work harder get a better job, when can I buy my own dream flat, how to teach our children better, how to make our parents happy. I think worrying about these kinds of problems is much better than worrying about the problems of refugees in Syria.
But how exactly are we to investigate China? Can a western journalist (or indeed any journalist) travel freely around China with no minders? Can they interview people and freely publish their opinions without fear of any ill effects on those speaking?
Is uniting the country really what it wants anyhow (maybe a few people in Tibet or Xinjiang are not so enthusiastic as you?).
Your argument rests on "I'm pretty happy and hopefully everyone else is too" but you have no way at all of knowing that.