Different place have different culture,let only different countries.You choose to be a teacher in Luoding ,you know it is small and poor.so you have to learn to respect the culture first.You curse every innocent citzens in luoding.They don't want to sell things to you because they are afraid they can't satisfied your needs and they don't know English at all.You can be a college teacher because you were in Luoding,if you were in Shanghai or Beijing,i can say you are nothing.
We all have difficulties on our job,you can curse your boss,your colleagues.But the students you were teaching are innoent.
Maybe you can tell people why you left.Why you are so angry.
Leaving without any signs is impolite.
College is different from university,students are not as good as the ones in famous universities.You can be patient.Though English is the second language in china,chinese students have great difficulties in learning English,cause they don't have the habit of speaking English all the time.And your duty is to guid them to buil this habit.
And all you were doing is complain.
You are not a good teacher.