Your dad probably has some sort of personality disorder. My dad is like that too.
One time his mother was in the hospital and he came to the city to visit and we went to have brunch after the hospital, and he began to offer me to go to his summer house in another country. I kept politely declining because I don't have money to spare, and then he suddenly started screaming "WELL JUST STAB ME. STAB ME IN THE THROAT. Stab me if you hate me so much!" I don't know wtf was going through his head, but it was probably "We are having brunch. I am a completely normal dad".
Last year he came over to visit with his mother and it was kind of a bad time. I was recovering from a very long illness that left me unemployed and living at home for a year, and sort of between jobs and broke, and my laptop was broken. We tried to be civil and during the conversation he promised to take it to someone to get it fixed. Then he left without the laptop, we were sort of having a normal correspondence via email. Then he drove over here again, very suddenly and completely uninvited. I had to work on the weekend because I was preparing for three job interviews next week, and I didn't have time to entertain him. We went out for a walk anyway.
It happened to be some state event and everything was packed with police and every walkway was shut off with fences. I wanted to go home, but he insisted on pushing me to continue waddling through the crowd of fences and police. "You wanted this. You were the one who wanted this. We are doing this because you wanted this". Then he just sort of started provoking me, saying things like "does my beard irritate you" for an hour until I couldn't handle the pressure anymore and just snapped at him. We came back home, sort of made up and watched a movie. Come morning he is mad at me, giving me the silent treatment, calling me names. Then he leaves and fucking takes my laptop with him. At this point I am extremely baffled that he took it at all. I am a grown woman, I may have been in a bad place financially, but I don't need "help" from a psychopath who would drive 12 hours across country borders just to have a fight. A few months of not talking and he wrote me a very condescending email saying that he took it to service and blah blah, like he didn't explode all over me.
I respond with "Why the fuck did you steal my laptop" and he just flies into a rage. Calling me a nobody, telling me how I would never amount to anything in my life, that I am a loser, always miserable, always looking for a fight, a parasite, abusing grandma (WTF), only know how to spend and never tried earning money in my life (I was actually working 70-hour weeks and living a pretty opulent lifestyle before I burned out and got very sick). It all ended in Y O U A R E N O T H I N G.
This would all be great points since he used to be a millionaire, but he pissed it all away and he currently lives off airbnb and his girlfriend, who is in like third grade and working three jobs so that she can get abused and yelled at. He hasn't been employed in like 15 years and it's all the illuminati's fault.
And a few weeks ago I found a family album with my stepmum and my dad's business associates and they're all these fat, red, angry men with prostitutes and trophy wives who are all 16, wasted and falling over themselves, and he's showing off his sports cars and making cocaine faces in all of the photos. I think he just scrambled his brains with the constant cocaine use. I can't believe I used to trust this loser and take anything he does seriously and let him shape my life and how I think of myself.