you hate a specific person 

**** you - you hate them so much your spells get upcasted for free only if you also target that person in the spell

you jackshit - your nat 1s "unintentionally" on attack rolls act as a nat 20 against that creature

AINT ESCAPING ME - your reach is infinite as long as your target on an attack roll is that creature

GET THE HELL OUTTA ME - your rage or concentration time extends if you think about that creature out of hate

IM YOUR BIGGEST HATER - "euphoria by kendrick lamar" plays in your head while using this feat

LLOYD FRONTERA FACE - you have advantage on intimidation checks when your talking with someone and their name gets pulled out

OUTTA MY MIND - you get 1 psychic damage each time they get mentioned in a conversation that you hear and dont hear (bonus 1 damage if they sneeze and think that someone is talking about them)