I think that's your impression because you have a pre-existing opinion about GUE and don't want to see it any other way.
Nothing could be farther from the truth. I used to fly combat jets from aircraft carriers. The Navy has a standardized program for flying, which I loved.
When I started my PADI OW training, my first impression of the training and gear was, "This is bull ****." While doing more research, I stumbled across GUE and I was all in. The standardized program is exactly what I was looking for. My first BC was a BP/W.
When I signed up for GUE training, I knew nothing of the controversies surrounding GUE.
I told Dean before the class that I was a new vacation diver (80 dives in 3 years) and I really needed good training and constructive feedback. I was tired of PADI instructors blowing smoke up my ass and always telling me I was doing great without offering help to correct my deficiencies. I told him that I didn't know if I was a good or bad diver because I never got effective feedback from PADI.
Dean put me in doubles for the class, with an oversized wing for steel doubles, and I did not receive any constructive feedback. He and the other two instructors viciously ridiculed me, blamed me for their errors.
Dean constantly ridiculed me for not contacting other Fundies students to get the class handout before the class, which I had no idea that I was supposed to do. Dean refused to give me a class handout, kept asking me questions from the handout, and incessantly ridiculed me for not knowing the answers.
They jerry-rigged the weight on my doubles set, against my insistence that I use a V weight. They ridiculed me, and demanded that I dive with the jerry-rigged weight. I even offered to buy the V weight, but they refused to sell the weight to me. When their jerry-rigged weight fell off during a dive and I had an uncontrolled buoyant ascent from 30 feet, Dean screamed at me and failed me on the spot for the weight failure, then reversed the failure. Later during the class, the instructors played the video of my uncontrolled ascent over and over again, laughing at me at making degrading comments about me for 20 minutes.
The entire class was like this. Every minute of every day. I could tell you about a few dozen other bad experiences. I got a provisional, and when I returned to Florida for a re-do the abuse was 10x worse.
I did everything possible to make GUE work for me, but GUE made that impossible.