- cultural incompatibility
If we were to do a demographic poll of all textbooks written for the TEFL industry in the last 25 years, then we would probably find out that an outstanding majority have been written by:
1. people who look like Mr Bean and who share gender
2. people from within Mr Bean's age group
3. people who actually think that Rowan Atkinson is funny
And yet, were we to do a demographic poll on all the learners of English we would discover...
see also: reasons I don't like most textbooks (1)
reasons I don't like most textbooks(3)