Pointing and laughing at people because you think they can't shoot for shit is not helping in any way. I understand many people are not really interested enough to really try to improve. But more people would be with just a little sincere encouragement rather than derision from some smartass knowitall at the range.
To truly help someone, you'll need to go through a troubleshooting process of elimination. Eliminate as many of the non-shooter variables as possible. To me, ammo is the easiest to eliminate. You can't even tell if it's you if you're using ammo that patterns like a shotgun, so eliminate that possibility. Get some FGMM ammo and try it again. Once you get good ammo established, THEN you can actually tell if you are making any other improvements with form, scope/sight mounting, or if the gun just won't shoot.
Let an AR-experienced shooter shoot the gun. If they're truly trying to help and are not just an equipment snob telling you to buy a $5k AR and a $4k scope, they will be able to at least demonstrate that the gun is capable of shooting a decent group.
