I have this, and I work in the office. Due to there only usually being two of us in the office that sits 36 people, it's quiet...
The bloke I work with is a lovely bloke by all accounts... however on Friday he cracked out a packet of corn nuts. It was so loud and immediately triggered my miso, from 0 to 11 white hot rage in an instant
. I ended up going outside for a cigarette and punching a brick wall, because I know I can't punch him in his fucking throat, and I was so angry.
I end up self harming because I know I can't hurt people. That's why I wear headphones the loudest they can go whenever I'm out and about. Earpods have been a fucking godsend.
Miso is an awful affliction to have, I can't help the reactions I have, in my head if someone is eating, chewing and popping gum, or whistling near me, know that in my head I am calling you a cunt and calling you every single fucking name under the fucking sun, and and I want to rip your fucking throat out. However I won't, I will just hurt myself instead.
No amount of just ignore it, get desensitised to the noise, suck it up, get over it works. The only thing that works is not hearing the noise in the first place.
The saddest thing is, is that the people who are closest to you, that you love the most trigger you the worst 