As aatrox, When your team isn’t looking to fight, split push and apply pressure elsewhere on the map.

Avoid team fighting during the mid-game unless you have your Ultimate R up. When it’s on cooldown, you’ll miss out on a lot of sustain and damage, so you must play around with this abilities cooldown.

In mid-game team fights, look for picks by flanking the enemy backline. If you can get on to an enemy carry, you will increase your chances of winning a fight.
 As aatrox, When your team doesn't want to fight, divide the push and apply pressure elsewhere on the map. Avoid team fighting during the middle of the game unless you have your Ultimate R Up. When it's on the cooldown, you'll miss a lot of support and damage, so you have to play around with this cooldown of abilities.