Misophonia IS a disorder since it implies an EXTREME abnormal reaction to certain sounds. Anyone can be made uncomfortable by certain sounds, just like anyone can become uncomfortable by being locked in a closet or seeing pictures of the deep, dark ocean, but people with misophonia will tend to have a reaction along the lines of triggering fight or flight response which they tend to have trouble resisting action upon.
I didn’t 4 years ago but now I do only if I know the person who’s chewing... who is most likely my guy friend he eats like there won’t be any food for months
It's a disorder, technically
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Supposedly in some countries it's considered rude if you DON'T make a lot of noise while you're eating