I’d ask how you define evil in this case. To me, an act is evil when the net detriment to the planet and its contents (including humans) is greater than the net benefit it creates, and the actor pursues said act knowing this. I’d argue it scales with the nature and context of the act. It’s hard to say this isn’t real. But yes, we all have the capacity for evil, and also can be complicit in other evils by dint of normalized behaviours (without necessarily being ‘evil’ ourselves)
I do agree that an absolute Evil doesn’t exist, the same way an absolute Good doesn’t exist. But we’re a pile of writhing meat puppets on a moist, moldy rock - we don’t exist on that level in the first place.