Wave position does not matter as long as its not near his side. Aatrox can poke you with q’s throughout the lane but as long as you aren’t getting frozen on its fine.

Put minions in between you and Aatrox so he cannot land his w on you. Avoid getting hit by his q2 or q3 especially without him using his e. Run Dshield and second wind to survive his q1 poke.

Give up cs so you can dodge qs. Not taking damage is your first priority in this lane so you can avoid getting dived by their jungler. Farm with q and e until six you will never win fights before. Post six bait out his dash and q1 and look to q him through a minion and auto attack him for the duration of the slow. When he is about half health you can commit to an all in if you ult his q3.