He didn't say he disliked the CG graphics. In fact, later he said he liked the game. He was mad at the time because the marketing team of Nintendo originally told him they didn't want to release Super Mario World 2: Yoshi's Island with the graphics it originally had, they wanted it to look like DKC since it had just come out and sold huge. He never disliked the game, he was just upset at the marketing team and took it out on Rare in a interview (saying DKC proved that people would put up with mediocre gameplay as long as the art is good). So even when he dissed DKC in the interview, he never said the graphics were bad.