Irritating or aggravating; causing strong annoyance or anger that is hard to tolerate.
約束を守らない人の態度は本当に腹立たしい。
The attitude of someone who doesn't keep promises is really infuriating.
彼の言い訳には腹立たしいことに同情すらできなかった。
To my annoyance, I couldn't even feel sympathy for his excuses.
渋滞で遅れそうになると、誰でも腹立たしく感じるだろう。
Anyone would feel irritated when they might be late because of a traffic jam.