I have this. And I really really. wish I didn't. People, friends,I love dearly, work colleagues, bosses, I need to be respectful of, and when they noisy eat I want to kill the fuckers. My reaction is literally one of extreme disgust and I can't look at them, I have to stare straight ahead, make conversation, and wait for it to be over, try to block it out, when in my head I'm thinking " that's fucking disgusting"
Messy eaters is another one that upsets me. I hate bad table manners. However messy eating doesn't disgust me as much as noisy eating.
In my experience it's men that do it the most, I don't know Any women who do.
My husband isn't a noisy eater, but even the simple act of him crunching on crisps and I literally have to stare at the tv, gritting my teeth, till it's over as I knows it's so unreasonable. 😔