If you don't need to speak politely (I believe so) and this conversation is to your friend, you can say "너 정말 짜증나.”

Hi, Assuming you're talking to your friend or someone with whom you don't need to be polite, here's a list of expressions you can use "너 진짜 짜증나!" You're so annoying! "그만좀 해! 짜증나!" Stop! That's enough! So annoying!! "당신 정말 짜증나는거 알고 있어?" - Do you realize that how annoying you are? - Trying to be as polite as you can! Again.. not polite ;) Hope you don't have to use it very often! Good day! - Goeun

In which situation do you want to say it?