Sounds like Inaba thinks they're both to blame, but clearly Kamiya was pissed at how Microsoft handled things.
Scalebound Director Pissed at "Shits at Microsoft," That Are Messing with him
Translates to:
"those shits at MS… are they fucking with me…?"
Scalebound Developer Laments Microsoft Taking 'Brunt' of Blame for Cancellation
Speaking to Video Games Chronicles, PlatinumGames studio head Atsushi Inaba discussed Scalebound's cancellation, noting "both [Microsoft and Platinum Games] failed" when it came to the project.
"I think there are areas where we could've done better and I'm sure there are areas that Microsoft as a publishing partner wish that they could've done better. Because nobody wants a game to be canceled," Inaba said.