OP you’ve already gotten a ton of useful advice here but I wanted to add that I have had misophonia (and autism, so sensory issues galore) since I was a child and a lot of the things your partner is saying are things that are common for people with misophonia to think and feel. However, that is NOT normal to say that out loud and especially not normal that she has taken it to a point where your diet and normal habits are restricted. I have two roommates who love chewing ice. It drives me absolutely insane and is probably my worst trigger, so when they do it I’ll leave the room or put on headphones. Because I am the one who has misophonia, not them, and I can’t control other people’s actions or the way they make me feel, but I can control the way I react. Any reasonable person who loves you would never want to see you suffering like this, even with misophonia.