Your dad sounds a lot like mine. I’ve always thought he was one of the smartest people I’ve ever know. He was an engineer and a math genius. Unfortunately, as hard as he tried to tutor me, math just wasn’t my strong suit.
He was a devout conservative and just a wonderful human being.
Sounds exactly like mine! My father only once lost his temper while trying to get math into my brain. I had to run into the bathroom and hide! My mother came to the rescue, lol. Poor man, probably had a tough day at work and came home to a little pin head.