Question

Dana’s younger cousin is even more annoyingly than mine. I need to fix the adjective error.

Answer 1

Dana’s younger cousin is even more annoying than mine.

You just change “annoyingly” to “annoying”

Answer 2

Answer:

Dana's younger cousin is even more annoying than mine.

Explanation:

Annoyingly would be used in the context of, " Dana's cousin was annoyingly poking me," so it will be near a verb. Annoying is just generally describing the personality of Dana's younger cousin.