Can someone explain Quinn's passive to me

Why does she get a passive that does upwards of 600+ that has zero interactivity. Like she starts attacking you and one of her autos just gets to do half of your health for no reason? WTF? if she doesn't kill you with her insane burst then she just runs you down with the move speed and ranged autos, or she can just R and get to you before you have a chance to get away.

I just don't understand why kits like hers are acceptable, she makes it so any champ that requires any type of actual thought is obsolete cause she simply does way more dmg with all targeted moves, and if she doesn't lead with the blind, it's a free after E, it's gross.

This damage meta needs to end if this game is ever going to be respected again, like I'm ashamed I play this game, because I honestly believe it is the more poorly balanced game to have ever existed.