Can’t you be frank about it? like “sorry dude, nothing personal but I just want to mind my own business while having my hair done”, a little “thank you for respecting that” at the end with slightly extra tip and you will both become your favorite barber/client.
Thanks for the list, I was not aware of Bleach, Jujutsu and Bungo are being aired, I put everything in MAL watching list untill they finish airing. I just can’t watch them one episode per week.