Fans of the original cartoon have mixed opinions at best about this series, which I think is stupid. These are trolls and purists who don't acknowledge the true creators or source material. This was one of my favorite shows of the 00's. I never see that many people praise it, I never see it being brought up at IGN and people like Stuttering Craig bash it, I consider this cartoon to be underrated. There's plenty to dislike, but there was more to dislike about the classic cartoon. I also think this show has more to like: great animation, good action, well developed characters, impressive villains, fantastic story telling. And yeah, the last two seasons are mixed at best, but I've seen worst writing at times.
If you haven't watched it yet, check it out for and decide for yourself.