We must be careful not to generalize when we have dicussions about EFL in China. Posters making statements like 'all Chinese training centres are crap' are undeserving of our trust.
Another thing that I've noticed is that posters tend to care little about individual complaints made by posters in trouble with their employers. Yet, they will make general statements about those exact same problems. This indicates that many posters distrust what posters in trouble are posting about their own personal problems, or simply just don't care at all about the plight of such posters.
It also seems to me that there are many, many self-serving foreigners teaching EFL in China. By being disunited in the workplace, they reduce the options available to them that could have been used to prevent an unscrupulous Chinese employer using or abusing them. United we stand, divided we fall, as the saying goes.
Then there are those who are academic snobs in terms of what they are teaching or where they are employed or how good they are at teaching based solely on their own opinions only, of course. EFL in China covers the teaching of English to young children up to businessmen and company employees. If a person wants to find reasons for complaining about anything in EFL in China, it's not hard to do so. EFL in China is far from perfect. But there are clearly many foreigners here who have been teaching it year after year without feeling the need to complain online, and enjoy living in China. In contrast, there are the China school bashers, and there are the foreign teacher bashers too. When someone starts bashing away about a part of EFL here, it's all too easy for others to jump on the bandwagon. But, as I said a little earlier, an individual's complaints about something unfair that's happened to him are often ignored altogether, and sometimes it is even suggested that the complainant is lying. Anyways, we can make our own judgments by trying to analyse what we read. It's a case of trying to separate the wheat from the chaff. Without the forums, we wouldn't be able to get much useful information.