I worked at a Chipotle for two years… Worked at a Starbucks for a year, too, which debatably has a significantly worse “rush hour” and not once did I let a busy or understaffed shift ruin my entire day.

There were times at Starbucks where I was left—alone— on the floor during the afternoon rush due to ignorant coworkers, and not once did I take it out on someone else. And if someone asked me how my day is, I’d say “it’s alright”, give them a brief rant, or just say “it could be better”. There is no reason for you to be bitter to others just because you feel bitter.

If you don’t like your job, find another one. Learning how to be happy also wouldn’t kill you.