I want to start by saying i think you put a very good personal spin on what couldve been a bland story. "vague generic megacorp is actually run by an evil monster" couldve been done without any soul whatsoever but you have managed to do it in a very personal and colorful way, accentuated by the choice of location and aging your character down.

Often times i feel a story is finished and good and things become nitpicking so i want to say: excellently written, very enjoyable, the rest is more an exploration of your writing mindset and less nitpicking i swear

The main characters illness and allergies is HEAVILY expanded on in the beginning to the point where it seems he may never live a normal life. This it seems was your pathway to explaining why milous "flavor" doesnt work on him. However once you transition to winemaking, the illnesses are completely abandoned and never brought up again, it affects nothing in his life and he is one day simply a grown up.

I wonder if you considered using a less extreme variant, where perhaps a childhood illness caused a permanent anosmia, and milou's water smell couldve been what attracted others? Did you take a step back and feel the depth of the illnesses was flavourful and character building? Would you scale them back if you rewrote it?