Do I Press It???

I have a problem this time around, and I need to release my frustrations before I unleash a wrath unknown to man.
My mother has been dating this "man" for about 12 years now.
She stumbled upon him on a college campus, where she works, in a then position of "house-sitter" for the athletic dorm. He had no car, no money past his weekly check, no house or apartment, he was renting out a 10x10 centiblock room with a bathroom from his aunt who, besides his work around the house, wants nothing to do with him. He did not even own a checking account until my mother came along and introduced the concept of saving money to him. He barely received his diploma, so you know he does not possess a college degree so he is not a "struggling genius. He is loud and OVERLY-talkative. He resorts to childish antics most of the time, seldom grasping the cuffs of adulthood.
Fast-Forward 12 years and he lives with her, struggling to help pay rent every month, sometimes his ass has to be covered by my mother months on end. He is still loud and OVERLY-talkative, resorts to childish antics and rarely behaves as an adult. He is disrepectful, and does not even have total respect from his children who seem to curse him every other conversation that he has with them. He whines(neglected to mention that in the "12 years ago" section), and is too sensitive.
For Example:
I do not eat pork, for I see myself later down the road only eating seafood. Every time this fact comes into play, he becomes offended, almost as if I am disrespecting him. Just the other night he cooked dinner: FRIED PORK CHOPS. My mother, whenever she decides she wants pork for dinner, always cooks a side meat dish for me, and it is usually enough to hold me over for leftovers just like everyone else' dinner would. This, excuse my language, motherfucker fries up the pork chops and did not even think to cook something else for me(mind you the freezer is packed with other meats besides pork). This is a reoccurring thing with him. Almost everything he does is out of spite or just straight up bullshit. I am a college woman now, so open-mindedness is what I breathe, so this shit has pushed me to the limit, and my summer break has JUST started!!! I am so close to strangling him it is in need of some borderline-psychiatric therapy sessions.
I always thought the parent relied on their child's response to a new person to determine whether or not to continue dating them. Just because he has taken us on as his "children" does not mean you should keep him around us.
Myself, as well as my brother and sister do not care for him one bit.
I have got to get away or I will kill him.
As far as human judgment goes he deserves it, for reasons that cannot be expressed for the sake of my mother's private affairs.
I feel better, but I am still wondering, do I press it?