The Legend of Korra is fairly hard to beat which may be expected since it's from Bayonetta creators. The truly challenging stuff starts at chapter 4.

Even with three very useful items to give me healing, extra power, and so on, it's packed with groups of enemies and huge mecha bosses. The second bot was definitely unexpected and bots have two health bars to drain and different stages of the battle.

Some game design decisions are horrible, like fixed camera in certain areas. But also expected for the genre, I just don't like that stuff.