It’s not a cube
You’re not wrong. It’s dodecahedron-shaped. But I think the people who created this gave it the cube designation (“Cube” is in their official title) because it is an offshoot of the Rubix Cube which has name recognition. But again, you are not wrong.
I’ve never met a MegaMinx I didn’t like. Mmmm
I like how they show you how to take it apart.