How does a Western rider get used to taking English lessons?

I have been riding since before I could walk but I've never really had any formal English training (just a few lessons from friends) so I enrolled in some classes because I want to know more and be the best horsewoman possible. My first class was Saturday and It was a disaster. The teacher griped about everything from my posture, my outfit, my trailer, my tack, everything. When she said my horse was "an old nag" I got downright irate (I was around children so I held my tongue and didn't deck her in the mouth like I wanted). She used phrases and words (specific to English riding) that I'm not familiar with and then made me sound like an @ss because I had no clue what she was talking about. She barked, yelled, and complained so much the kids were looking at me with sympathy. It was embarrassing. I ride to ride for the pleasure of riding and being with my companions, my horses, not to show off or please others. It's very frustrating and I'd like some advice on how to deal with this. There are not any other stables in the area that I know of and she's the only person giving English lessons around that I have found so far. Suggestions? Ideas? Thanks.