I'm not much impressed by all the doom and gloom some people talk about Canon on this site. My view is if they really think what they say on here they would be best going out and using what ever it is they think is so fantastic. It would be a lot less stresfull for them.
Having said that I will soon be a Nikon user. My 1Dx is such a great camera it has taken a picture that won me first prize in a national competition, well its in a national paper anyway , and the first prize is a Nikon.
Well I'll be happily getting the best I can out of that camera now, accepting it for what it is and enjoying my hobby.
What can you do, haters will always hate. Btw which Nikon did you get? Personally if I were you I'd keep the 1DX unless it was a top-of-the-line Nikon (even then I'd keep it ), but that's your decision to make. Just remember it's the person behind the camera.