So. Without trauma dumping, I'll simply say my dad is a bad dad. What's a father's day gift that says "you're dead to me, but I'm still doing things to keep drama at bay"?
Big drinker? Cheapest bottle opener or a nip of his favorite sauce.
Angry asshole? Get him a therapy ball.
The biggest thing my condescending asshole stepdad taught me was "Kill them with kindness". If you're kind in a backhanded way, it'll piss them off and you can feign innocence.