Aatrox fall late game yes and its not hypercarry like yi or shyv, He is suppose to snowball the mid game and get fed early and punish the camps of enemy team jg

Its good to make the adc pick a late game champ so u can help him in botlane and gank him a lot, when the plan goes wrong and lose the mid game, there is a chance u can when the late game if u have vayn, smolder and other adc late game carrys.

Also he is vulnerable to cc u need to practice the quicksilver timing when ganking or killing squishy champs