How to counter aatrox

Title. I have never had problems with countering any hero until now. I tried everything. He uses abilities 24/7, their dmg is huge. Full armor build did nothing, he still nuked me. And ulti? He ended up with full hp in 3v1 fight against us under out own turret (in late game), means we just couldnt kill him in teamfight and game was unwinnable just because of him. What to do against this brainless champ? Thanks for any USEFUL advices.
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