Why Karl Ove Knausgaard cries at the death of his father

Fascinating to see how the strands of Karl Ove Knausgaard's My Struggle begin to loop together toward the end - at least in the penultimate Book 5: In this volume he's describing the 5 or so years he spent in Bergen as a young man and aspiring writer - it's the most straightforward chronology of any of the books so far - we see him mature from a kid both cocky and insecure, coming to recognize that his talent is thin or at least undeveloped - and over time he builds his talent, begins to get a reputation as a smart reviewer and critic, has one breakthrough story and then, right near the end of the book, his first novel is accepted for publication. Meanwhile he builds some long-lasting friendships with other writers of his generation, and, more important, after several disastrous relationships and several typical bumbling youthful relationships he meets a lovely woman and they marry - not, as we know from early volumes, happily ever after. The twist is that right near the end of Book 5 KOK's brutal, domineering, and pathetic father dies of alcoholism - and we're put right back into Book 1 - but now we know so much more about KOK than we did at that point in the sequence. In fact, my memory failed and I had thought that KOK was an established writer, and perhaps on his 2nd marriage, at the time of his father's death, but now I'm reminded otherwise - he was just about to have his first publication and he's just a few months into his (first) marriage, which makes the death of his father more strange and poignant- he's still so young, with such a seemingly bright future ahead, and now he has to plunge into death. It's still puzzling how deeply KOK mourns his father - he's very sensitive throughout his life and prone to crying, everything from moist eyes to sobbing, but I wonder why he wouldn't just think good riddance to the son of a bitch, but it's not his father - it's, to paraphrase Hopkins, Karl Ove he mourns for.