Yeah, it sounds like your instructor did you wrong by not pulling out the books and brushing up on his technique. However...

You are a Commercial pilot already. You do need to take some control of your training. When an instructor teaches, ask them for a reference or picture, something you can refer back to later to study on your own.

I don't think it's right to belittle a student on a checkride, but examiners are usually a little crusty. They may gripe and moan and get after you in the plane the entire flight and then say you did fine on the ground. That comes with the territory so be warned. Not saying it's right, but it does happen. I also think the examiner was expecting more from you. He knew you had already earned a Commercial and were just adding on the SE. So fair or not, he expected you to demonstrate the appropriate level of knowledge and became frustrated when that didn't happen. Like others have said, speak up, ask lots of questions, get reference material, and prep on your own in addition to what the instructor gives you. At this point you know how to do that. You will be fine, now you know what's coming. Better to be overprepared than under.