I would just like to point out - that not all instructional classes at the NRA are bad. I took my CCW course at the NRA over 2 years ago, and we had quality instructors.
There was a former FBI agent who covered the legal ground for us. And from reading what I know now, she gave us very good advice as to how to handle being approached by a LEO on a traffic stop while CC a weapon. And how to handle a shooting. (If you ever got involved in one.)
The main instructor was a good one. He taught us safety basics, everyone had their unloaded guns facing the wall. Away from each other. I was very happy with the safety demonstrated in the class.
There was a holster specialist who gave us terrific advice on which type of holsters to use while using CC. That was excellent information and I still remember a lot of it today.
Then the instructor who did my range time was a 30 year veteran and had me tighten up my groupings to 1.5 inches in under an hour.
I was very happy with the money I spent at the class.
Sorry that you did not have the same experience.