If dealers find being at gun shows so frustrating then they shouldn't go. No tears for gun dealers. You chose to get into the business and take the risk, you reap the rewards and consequences, I'm just a consumer.
I go to gun shows to fondle firearms I'll buy elsewhere cheaper should a deal come up. Nothing more, nothing less, and maybe some gun cleaning supplies and cheap bulk targets (not anymore since I learend to print off my own targets on my printer). Once in a blue moon cheap 8mm and 7.62x25 ammo as well as some reloading components (rare especially now).
If I buy a gun its from a greybeard who showed up at 9:00 a.m. and is selling off his life time collection out of his trunk for excellent prices. I'm not selling any of my guns privately at a gun show, that's what gunbroker is for.
Gun shows should be swap meets like before 1968. But now they are horrid showcases for overpriced goods and license holders get ticked when you are sitting there with your smart phone comparing their prices to Buds or gunbroker as if you are the bad guy.
If your upset because people want guns without "paper" oh well that's reality. Buy a bunch of guns for yourself and let them sit in the back of a safe for a couple years so you can "liquidate your collection." It that's too hard, then that's your problem.