With all due respect, you are wrong and clearly not seeing the big picture.
The main purpose of nerfing/ buffing an item is because of how the gun impacts the meta game in graal. While the admins do a decent job of testing out some guns, the others... not so much. However we can't exactly blame them because they don't have the same mindset as a regular person playing graal might have, nor do they know how and what will affect the overall gameplay. For example, when I played graal, no one cared about the $4.5k gun in gangster zone called the m4. Look at it now. It is one of the standard issue "sparring gear" in the current meta game. In conclusion, buffing and nerfing a gun is indirectly caused by us the gamers, and admins are simply people who change it accordingly, whether or not someone agrees with it or not.