Frankly, Disney has been known for their great villains, and the two main bad guys in Frozen aren't very interesting. (combustiblecelluloid.com)
Her fighting mechanics are focused on kicking and her gravitational abilities, all essential in her battle with the Nevi (the titles main bad guy hoard). (kotaku.com)
The floating head had been built up as the main bad guy but his demise was understandable and necessary. (rottentomatoes.com)