I am not, in any way, shape or form, a fan of the previous Devil May Cry games. I thought that they were nice from what little I played of them, but I could never really get into them.
I am, however, a fan of Ninja Theory's previous games. Loved Heavenly Sword, still defend Enslaved in spite of it's faults, all primarily because they had solidly told and interesting, if at times inconsistent, storytelling. Ninja Theory were supposed to take this game series that had previously been known for it's combat and take it in a new, story-oriented direction.
And they failed, spectacularly. The story they came up with is the kind of juvenile power fantasy that you would expect out of a middle-school student, with boring and trite dialogue and some of the worst one-liners you're ever going to hear in a game. Worse still is the cast of characters, one of whom is effectively a cardboard cutout, another who is cartoonishly inconsistent in his actions throughout the run of the game, and a protagonist who seems to go out of his way to Poochy is up, only to result in the most unintentionally loathsome player character in recent gaming history.
If you take it all as a farce then you may be able to get some enjoyment out of the story in this game, but that's a defense mechanism. This is, far and away, Ninja Theory's worst game from a storytelling prospective, and I continue to be shocked and appalled that such a formerly outstanding studio would release a product of such low quality.