If he's in it for the mindgames mostly, as a lot of readers probably are, it's not surprising to be annoyed with the Protoporos arc. Of the 3 games we've seen, only one of them had a clearly defined mind game involved. Baku's first match, Kaji's match, neither of them had the clear mindgame aspect that gambles up to that point had.
That being said, the arc has done a lot for character development, so I've been enjoying it a lot all the same.
Edit: Wait which part are you disputing with that quote...?