Just why are those animations so clunky

Lmao you built him attack speed. xD

I don't know if you've noticed, but Aatrox's animation are quite long. It reflects how powerful his attacks feel.

Tbh I'm not surprised that it's the result you have once you build attack speed +++. xD I mean, look at the base animations. How could you convert them into fast animations?

Still hilarious though xD

Well, you have tons of attack speed. That does tend to remove some frames of animation.