Told my friend about my Misophonia

This friend has a habit of chewing very loudly and talking to me when she has food in her mouth which is honestly just nasty to everyone. Before telling her abt misophonia I repeatedly asked her to stop and she didn't so I decided to give her more background on why I don't like it.

I told her about having misophonia and I was worried she was gonna act negatively but I did it anyways. I sat down with her at school lunch and told her about these earplugs I have where I can hear her talk fine just not chew. I also told her that I can't control the way I feel but I can control how I react. So to help not get mad or just internally stressed, I'm gonna wear the earplugs.

Then she got upset with ME for the earplugs. She said a bunch of stuff to make me feel bad like: "Oh do you not want me to sit with you?" "You just don't want to listen to me" and then she didn't eat for the whole lunch even though I said I couldn't hear her chew at all. Some people are so entitled and ts just pisses me off. Like the general population thinks you're rude for chewing with your mouth open anyways, why am I the villain?