Your feelings are very understandable to me.

I’ve also grieved that my family was not the truly loving family I thought they were. Now I maintain a new, more distant relationship with them, having had to completely adjust my thoughts about them. It was not alcohol at play at all for me, though...just serious deficiency in empathy and respect on their parts.

Maybe you and your siblings can take your dad on a little vacation to spend some quality time together?