Troublesome, Inconvenience, Nuisance
noun, な adjective
You've been led astray and you've been misguided. What a trouble, and indeed a troublesome inconvenience all this is.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
I am bad at Japanese, so I might be an inconvenience to you.