Feeling extremely annoyed

Hi, I need some help figuring out the underlying issue. I am feeling extremely annoyed which all crystallized after receiving a text that read “you are not a nice person” from a person I interviewed for a job. The meeting did not go well.
C: text
T: I am tired of those people
F: Extremely annoyed

The problem is that it got me into writing a list of all the things that I am annoyed at the moment and it is a long list.
Question: What can be an underlying reason and what shall I do?