It's a pity that your advice to schools and recruiters is not couched in good English. I sense bitterness in your rant. A piece of paper from a University denoting a degree does not mean that the holder is a good teacher. In addition, I cannot believe that any teachers come to China for the salary, an interest in the country may be more likely.
I suggest that you go and lie down in a darkened room for a while, calm down, then take a course in the English language.