I assume you have one of the HD Collections? If so give it a whirl. DMC2 is mediocre. It's not a pain to play, its just pretty bland. I've only played it once, compared to the rest of the series, it's not good. But generally it'll kill an afternoon or two. It's definitely the low water mark of the franchise, but having played through it I cannot say I disliked it, only that it was meh with a few cool points.
But yeah, nothing that happens in it matters to the overall plot, and it is the weakest in the franchise. So if your time is precious that a game that'll just waste time is something you want to avoid, then avoid it.