Lets suppose for the sake of argument that your derogatory suppositions re the so-called good doctor of Yuncheng IELTS School and his recruiting agency are accurate.That done,allow me to extrapolate,if you will - surely if what you say is correct about Yuncheng IELTS School being such a rubbishy outfit to work for,the 25 or so FT's employed there at any given time must either be masochistic,or afraid of possible negative repercussions to them were they to publicise their workplace grievances online,or just so incredibly dumb that they are incapable of realising the sorry plight they have unwillingly put themselves in as employees of 'Dr' Wang.
In my view Yuncheng IELTS School cannot be as bad as you paint it to be,or else online complaints re it would be rife,which they are actually not.
But I wouldn't rate Yuncheng IELTS School higher than an average employer in China.Maybe by doing so I'm being a tad too lenient.
By the way,I happened to notice that Sunny has deleted her most recent post.I wonder if she has done so because she feels its content has made her lose face.