To be puzzled or confused by something, causing feelings of frustration or annoyance.

To be vexed means to be thoroughly examined, discussed, or deliberated upon in a prolonged manner, causing frustration or annoyance.

To disturb or annoy, to agitate or perturb, to change the position or arrangement of something

To cause annoyance or frustration, to agitate or trouble mentally.

To irritate or frustrate someone, causing annoyance or distress.

Causing frustration or confusion due to its complexity or lack of clarity in finding a resolution or answer.

Feeling irritated or frustrated due to persistent and petty annoyances.