Sweetie! I'm sorry you had bad experiences. Speaking another language does make you vulnerable somehow, esp. when you have to prove yourself in exams and such. And the teacher can make or mar it, too. I've had a wide variety and some of them were great, but mostly too busy, too stressed and too overworked. (Esp. those TERRIBLE ones that put you off learning by laughing at your mistakes or interrupting every single sentence to correct you. You end up with your mouth firmly shut becuase it's too depressing to carry on. Urgh.)