I would think he'd be above this? I understand from a business perspective that he is happy more attention is on the movie due to bad reviews, thus more money, but coming from the creator of Mario just seems weird to me. Why would he be proud of this? At the end of the day, those are still negative reviews, and it comes across as someone who is just happy with the results even if the product is actually bad.
I'm not going to defend critics here as I think some, if not most, can be out of touch, but this is Shigeru Miyamoto we're talking about. He's been at Nintendo for what 45 years now? He's legendary and shouldn't concern himself with this. He could share this sentiment among the people he works with but reveal this publicly? I don't know.
I'll give him the benefit of the doubt and hope something was lost in translation or that the writer chose a clickbaity headline... Otherwise, it's not a good look on him, in my opinion.