I agree with most of what you said. But there are guns right now in the game that are so bad; you literally cannot use them.
AR-97 'Misery'
SBSR 'Coroner'
SBSR 'IRS'
Every SWARM variant
NCR 'Anubis'
S-247 'Oblivion'
R-2 'Harbringer'
Note that those gun were chosen by the community as the worst of the worst.