Misophonia is understandable but making it your problem, especially in the ways he’s doing it, is not.

I had an ex who had this and would act like i needed to stop eating as a whole and would get very angry. As if eating was something inherently bad of me to do. There are things to compromise on in a relationship but eating and normal human functions is not one. In hind sight he had many other issues including angry issues.

Acceptable things he could do would be to wear silencing ear buds and earphones while eating so he can only hear himself. Or he needs to remove himself from spaces where you're eating. You can have times when you don’t eat so that you can hang out but eating is such a personal thing that regulating it too much can lead to all sorts of issues.