I think this is actually a perfect example. The animations make it more complicated to follow, not less! If it just highlighted the stuff you were hovered over it would be easy to understand, I honestly don't get the motivation behind the animation.

Well, yeah. This app's UI is horrible. It's both cluttered and sparse. But what's worse, it's ANNOYING.

The key here is that animations happen outside the foveal area. Our vision is tuned to be extremely sensitive to motion and changes _outside_ the foveal area. So when something moves at the corner of your vision, it distracts your attention from your current focus.

This makes a lot of "modern" UI literally anti-productive. It actively _slows_ _down_ people and increases cognitive load.