He doesn't commit to giving the game its' due diligence. That's what's wrong with it. Star Fox Zero is a very short game, like 2-3 hours long. The fact that he couldn't commit that amount of time to play the game disgraces him, the site he works for and his profession. It's unprofessional and embarrassing. He had 2 weeks to spend that much time with the game, and he couldn't be asked to simply do his job.
I mean, it's not for us to decide what "his job" is, but I agree with the rest. To me it's not about right or wrong, and it's definitely not about liking or disliking a game; rather it's that I don't want to read shitty articles written by editors who care so little about the quality of their work that they can't even bother giving games their fair due (in this case finishing the game at least once, considering the short length) just because it wasn't fun enough. It comes off as self-serving rather than serving the audience.
Frankly, thinking about it further, it's disrespectful to the developer and to the publisher who handed you that review copy to write garbage impression pieces like this based on limited experience, perhaps even more so than if you simply don't bother writing anything. Do this repeatedly and publishers may just ask themselves why they are even sending you review copies in the first place if you aren't going to do proper work about the games.