Why are people saying "You'd be mad too if you were trapped away for 1000 years"? No, I wouldn't. I'd be dead. Even if I was immune to aging, didn't need to eat/sleep/breathe/drink or anything else, I would still be dead from such an extreme level of psychological damage. I am a human being, and human beings will literally die if they are locked away in solitary confinement for too long. We are far too social creatures for that and quite literally require some form of social interaction in order to survive. Just locking someone away for a single week often has extreme, permanent and irreversible side effects that cause them to become dangerously insane. Do this for much longer and they will simply stop living. The brain can't handle that level of damage.
You guys are trying to use "The Darkin are a race now" as a reason why it would be logical to treat them the same way humans would behave, but in the same argument you are also completely separating them from any kind of comparison to humans by assuming, wildly incorrectly, that someone would simply "be angry" after a thousand years of true solitude. No, you would "be angry" if you were sent to the corner for fifteen minutes. As the punishment grows, very different emotional responses begin to occur. I know the follow-up argument is gonna be, "Yeah well he's not a human he's a Darkin so he can just be angry about it" but then that brings me back to my original point of "So in other words you're saying he shouldn't have a human response to his circumstances and you just personally want it to be anger for no reason other than that's just what you want."
Anyway, the real issue is that people like me who love the current Aatrox will no longer have what we loved, and it will be gone forever with no trace of what it once was. I liked that old Aatrox couldn't be compared to humans. I liked that his motives and behavior were singularly focused on the one thing that he literally embodied. It made him seem less like "some guy" and more like a mysterious entity that I know next to nothing about, other than that he clearly does seem to be a perfect embodiment of one specific thing, seemingly without being clouded out by other irrelevant things. Before, I could say "Wow, a physical manifestation of a specific concept? How interesting!" but now he's just "another dude" and much less unique for it.
I'm fine with you guys being able to enjoy this new character and I genuinely do hope that you get a lot of fun and happiness out of him. I just think he should be a new character altogether, that way your happiness isn't coming at the cost of mine. I don't like Ezreal, but I wouldn't steal him from you guys just for that. I just accept that I don't like him and respect that he makes others happy. Why isn't this considered the proper way to handle disagreement? Why is creating pain for others our preferred method?