Can someone explain to me Gamespot's Nintendo hate?

[MarcellusMighty]

I either missed someone saying it already or it got glanced over, but Gamespot also gave Luigi's Mansion: Dark Moon a 6/10 and I think everyone agreed that it was at worst a 7.5 or 8/10 game. That review was just another example of trash, just like the DK review and Kirby review.