From your story and the other negative story, it seems there was a time the DIR/GUE community were arrogant and had an elitist attitude. That is unfortunate and would be a turn off and may have led to an intense discussion "outside"Good to hear.
When I was in the GUE-F class, they started talking about the "class handout" and all these formulas that I never saw before.
The GUE instructor said it was my responsibility to figure out how to get these handouts BEFORE the class started, and to master the material BEFORE the class, even though I didn't even know the handouts even existed. The instructor never mentioned these handouts during our phone calls before the class.
The GUE instructor was so angry that I didn't have the handouts that he refused to give me the handouts in class. Then he repeatedly asked me questions about the handouts, even though he knew I had no idea what was in the handouts. Then he ridiculed me in class for not knowing the answers.
Yeah. It was a fun time.
While it is disheartening to hear these stories, it seems like they have done a complete about face and have changed their attitude and the way they conduct themselves.
From what I've experienced, instructors are now very patient and the community as a whole is very encouraging and helpful. I've gotten so much help and guidance from non instructor GUE divers.
That being said, there's a slight bit of good natured fun and picking on me because my setup isn't completely Halcyon and I still dive with non GUE divers. The worst if it could be called that is that I also ice dive, and one GUE diver stated that cave divers don't have tandem lines. While true, dude was being a prick, I just ignored him.