Thank you for the in depth review, I also doing game reviews and I know that you need to be hard with it :)
I understand that the missing care in details ruined your experience. Usually in prototypes you can "close an eye" if there are small visual or audio issues. For the kitchen, I think using a different audio can't solve the jumpscare problem, because is the audio "cliche" that makes you the jumpscare, it recalls you a danger sound. It is my first horror game, but what I know is that 99% of horror materials are cliche. Making something original was something that required more study behind, I intentionaly preferred to experiment with a simple idea and push on the atmosphere. The fact that you want to see more is a positive thing.
Thank you again and I hope you will review my next prototypes! :D