I think we should have a turn of phrase for "I'm not in the right, but I AM annoyed with this situation, so I just need to go bitch to a friend about this before I suck it up and go do the right thing" because more and more I'm finding this is a critical element of functional adulthood.
Various tags on this post like "isn't that venting?" "isn't that kvetching?" and sure it's a subcategory of that. But those are missing the key detail of this specific case which is the "I'm not in the right."
It's the "fuck I'm NOT in the right, I GET that, I WILL be mature about this, I WILL just suck it up, I WON'T take it out on the person who's annoying me because they haven't actually done anything wrong, but by satan's spicy asshole I AM annoyed. So I'm gonna spend 5 minutes in private being a dramatic bitch about it before I get over it and go be a perfectly civil reasonable adult about it."
This is important.
Acknowledge the fact it's okay to be wrong and annoyed about it. Vent the frustration.
Put your adult undies on and be responsible for resolving the issue.
“Unfortunately my circus, unfortunately my monkeys”