Depends on their criteria. I personally believe that each movie should have its own set of expectations. Something to live by or something fans want to see. This is especially true of already established universes. Yeah the story could have been better, but I think this is one of those cases where story takes a backseat to the experience overall given that most fans of the game just want to dive right in, rip someone's spine out, land a huge combo, and get their fix for gratuitous violence. In terms of that, this movie definitely delivered, and if that's the criteria (which it should be, given the nature of the game) then a 9/10 isn't really that hard to believe. Now again, if you wanted something with a bit more drama, more character development, you've got other options, especially outside the "nerd" genre (MCU, video game movies, DCEU) but that was never what this movie was going to be, nor should it have been. It didn't need it.