Do you think your father loved you?
If you do, then I feel that the moments are real. The things he said, when drunk or sober, were real.
I choose to believe that parents that love their children give them the best that they are able. Sometimes what they are able to give falls far short from what a child needs and deserves but it is still the best the parent can do. They can't give more then their best - and what they do give is very real.
I think we can both accept that our parents gave us their very best and at the same time acknowledge that it fell short of what we deserved and/or needed. At least this is how I do it.
I was not abused and I feel that my parents did love me. I have never doubted that and my heart aches for those that do. I'm not sure where you are at but wanted to share my view. I actually had a harder time with the ending - acknowledging that sometimes it may have fallen short.