annoyance
/əˈnɔɪəns/noun
The feeling of being irritated or mildly angered.
Milder than anger. "To my annoyance" opens a complaint politely, and "a minor annoyance" is a very common pairing.
Related words
rageExtreme, uncontrolled anger.irritationA feeling of annoyance, or the condition of being annoyed.outrageA strong feeling of shock and anger caused by something unfair or offensive.agitationA troubled, restless state in which someone's peace of mind is disturbed.resentmentA lasting feeling of anger or bitterness about being treated unfairly.distressStrong pain, worry, or suffering of the body or mind, often sudden and severe.