Hayley Marshel. Because in season 4 all of a sudden she is a saint saying talking about some we need to stop hurting others for our family. And that is REALLY messed up cause the AMOUNT of people she has killed in the name of family is just ALOT. I also hate her because she has had Hope for FIVE years and she still gets NINE more years. Like the heck is this. Let Klaus get a chance to be with Hope.
I also hate Cami, because after she becomes a vampire all of a sudden she stops having faith in Klaus's redemption and she even stole the white oak stake just so she can get "her" family's belongings back. And they didn't save her seeing as she is dead.
Marcel. Because he is a desperate cry for attention. In season 4 he is complaining that Elijah ripped my heart out and threw me in the ocean. Like dude get over yourself. He has been planning to take the mikealsons down for a VERY long time so he can't start talking about we used to be family but he ripped my heart out. And he also used Davina just to have control of the city. And he is that one who didn't run after Klaus, Elijah, and Rebekah when they were running from their father.
Davina. Because she has the BIGGEST trust issues and after Marcel has started to ACTUALLY care about her and love her. She is STILL talking about some "I don't even know if I can trust Marcel I mean the first thing he asked me after I came back to life is if I can break the barrier" like honey he just mourned you and tried his hardest to bring you back. But when she met " Kol" in season 2 she trusted him and welcomed him with open arms. And even after he took the bracelet off of her she still trusted him