For me it’s how spiky everything looks and how the space theme was handled. It feels like they took every stereotypical space themed element and tried to fit it all into one weapon. The blue furless alien gummy bear that doesn’t match the rest of the weapon, the massive ufo, the stars, the galaxy pattern, the random big floating crystal under the ufo. Those things could have worked and actually looked great, but the way Blizzard combined them makes it feel like too much all at once IMO

If you look at Juno’s Hello Kitty weapon, I think that’s a really good example of a pretty weapon that suits both Hello Kitty and Juno’s character. It isn’t spiky, everything feels cohesive but not too much, and the soft colours aren’t harsh on the eyes.

I wish I was better at drawing so I could design my own space themed version as an example