I hate my dad and everyone thinks I’m out of line for hating him and only acknowledging him by his first name and refusing to be part of any type of family gathering including the photo we have coming up if he is there

First off, I will call him Ray (that’s not his first name) but Ray is my biological father. I HATE him with a seething passion. Ray and my mom are still married and have been my whole life. He’s not abusive to anyone or anything like that, he’s just a horrible person. He is never wrong in his eyes and he’s has the foulest attitude of anyone I’ve ever met. He is extremely bipolar and the most self centered, hypocritical person you will ever come across.I haven’t ever been particularly close with Ray, although he has tried to talk to me (nothing in common, only talks about his drone and rc racing and the military and all shit idgaf about)He is a mechanic and I’ll admit, he is extremely good at what he does. The final straw for me was two months ago the engine in my suv died on me. I asked Ray if I bought a new one if he would do the engine swap. He said yes. I bought a new engine and my suv is STILL not complete. The engine is and hooked up, but for a month now he’s been “working on” something to do with the oil gauge or oil filter or something. Yet he doesn’t do it. When I ask he gets an attitude and gives me some shit he’s not gonna have the car drivable until he knows it’s good (which I get and appreciate) but it snowed today and winter is coming and the only other car I have is a sports car that I can’t drive in the winter.For this reason (him taking so long and not caring or communicating) I hate him. It truly is the last straw. We have a family portrait in two weeks and I told my mom that I will NOT be there or to thanksgiving or Christmas if Ray is there. Everyone thinks I’m in the wrong but how can I be? via /r/Advice https://ift.tt/3enJMfV