How about I hate my boyfriend so much? I am going to destroy his will to live and leave him broken hearted laying on the floor and sobbing in much pain
Why do you want to cause your boyfriend pain?
Because come on we all get sick of people who think they are perfect.
Just because you are upset your boyfriend thinks highly of himself doesn't mean you should break his heart. It would be detestable to intentionally break your boyfriend's heart. If you aren't fond of your boyfriend you should breakup with him.
But I think he should not be so arrogant.
It seems you dislike your boyfriend's personality and if that is the case, it's best that you just end the relationship without drama and tension.