I feel the last questions, in particular, are going to be pretty misleading.
Many teachers feel they're unable to teach a certain way or perform certain tasks because of the nature of the education system, not necessarily because they lack the skill. For example, I know which strategies would be best to improve my student's English and how to use these strategies, but the student's levels are completely mixed (poor education system), my co-workers lack the English proficiency to support my teaching approaches, the curriculum won't allow me to use these strategies and I only see each class once a week.