octagonist - someone who gives you eight different reasons to be angry at

someone who gives you eight different reasons to be angry at them all day long

My teacher is an octagonist. He gave me eight bad grades and said I was 'a total mess.'

My friend is an octagonist. He told me eight things I did wrong and said I was 'a disaster.'

My dad is an octagonist. He gave me eight reasons why I was 'a total loser.'