Yes, in this case there isn't much more platform holders can do, even if they feature his game on the front page indefinitely it will get flooded with negative

Yes, in this case there isn't much more platform holders can do, even if they feature his game on the front page indefinitely it will get flooded with negative reviews and sales will be low. You can't compare VR platforms with iOS especially, but even Steam or a console market, because the number of users is orders of magnitude smaller (250K-1 million VR users per platform). In this case the best a platform holder can do is fund development so he can potentially make a better game (hire a programmer and an artist for example), but it doesn't seem like a situation where the concept was amazing and he failed on execution.