In what world do mages destroy every role?
Mid lane is where mages belong and since mid lane is getting spammed with assassins they are more or less being pushed to the support role thanks to lethality.
In what world do mages destroy top lane? Cass, Ryze, and even Lissandra are just 3. But have a kit that can help them manage in top lane.
In what world do mages destroy jungle? Little to no mobility and don't have much of a fast jungle camp clear.
In what world do mages destroy adc? They aren't much of turret melting champions unlike the adc class.
Don't take Hashinshin as a Mr. Know it all.
Of all people why him?
I don't mind a Mage nerf but at least consider this:
Valid reasoning (Hashinshin goes saying mages need to be reduced 25% without any reason, that was when the Viktor incident happened)
Hashinshin is a top lane main. Even if he's diamond it doesn't mean he understands other roles. I'm a Mage main and we struggle in mid lane thanks to assassins and mages are often played supports which benefits them a great load than mid lane (Which to my opinion they belong there more than support role).