The same happened in China, Korea, Thailand and India several decades ago in a highly unregulated industry like ESL. An ESL industry with such a large sector of useless language mills, run by greedy and incompetent providers, will attract the kind of backpackers and other folks calling themselves "teachers" while in reality they are not.The locals are absolutely right in looking at these folks with utter disgust. Also locals in the respective home countries where these "teachers" come from would do if such things happened there. Right they are!

I also would feel utter disgust!

Due to the lack of learning in the classroom, the party poverty tourism behavior of backpackers becoming teachers, and the fact that many leave their positions on short notice after a month, English teachers are looked at with utter disgust by locals.