obnoxiousivity
How bad you are at being annoying, like your annoyingness is a full-time job.
'I'm not being annoying. I'm just being me.', said by a kid who eats glitter for breakfast.
'Your obnoxiousivity is so strong, it's making my dog cry.', said by my neighbor who is also my enemy.
'You're like a broken kazoo in a haunted house.', said by my cousin who is also my nemesis.