If he thinks you are disrespectful, and you think he has serious narcissistic tendencies, I don't think this is a great match. 8 months is still considered the honeymoon phase. (My husband and I got engaged after 8 months of dating, and everything was butterflies and rainbows.) If things are this hard and this annoying now, what will it be like in another 8 months or years down the line?

I am sorry things aren't working out the way that you had hoped. Maybe, you could write a letter explaining your feelings. I would recommend doing it in the kindest way possible to avoid making him feel defensive. That way you can clearly deliver your concerns without getting interrupted. 🤍