That hit the nail on the head Aggie. I had some good photo teachers in College, but there was one highly arrogant one. He subjected everyone to bashing during critique sessions. I had one image that I knew was pretty damn good for a student, and all he could say about it in front of the entire class was "hmm, I don't even see the point of this, this image is a waste of time, why did you even bother printing this?, next please". I was pretty angry about it and my motivation to achieve anything in his class took a dive. After the class was over and he left several classmates came up to me saying that they thought the photo was awesome and don't listen to the jerk.
Remember that there will always be a few of the nasty self important types out there that will rip just for the fun of it. They are too self absorbed in their own worth to ever teach. I look for the teachers in life.