Yeah it is.It is Wario in the sense that Ganondorf in Smash is Ganondorf. Doesn't mean it is an accurate portrayal of the character. I'm not saying every single move needs to be pulled from a source game, but at the same time I like the feeling of seeing someone like Mega Man ripped from his NES games, or Yoshi from Yoshi's Island, Samus from Super Metroid, etc. All I get from Wario is that Sakurai was bored and didn't care for him in Wario Land so decided to embrace the comedy and randomness of WarioWare by making the character completely bonkers in many aspects.
Its wario ware wario, its accurate.
You don't have to like it, its accurate doe.