My Struggle Book 6 and the boundaries of autofiction

Karl Ove Knausgaard's monumental 6-book novel, My Struggle, takes a strange twist at the outset of book 6 as the novel seems to eat its own tail (tale?). As all know by now, this is a grand work of autofiction in which KOK recollects in sometimes excruciatingly minute detail the first 40 or so years of his life, with particular focus on his tortured relationship with his abusive, alcoholic father and on his "struggle" to become a writer and to fit in to his society (two conflicting forces). Strangely, the composition of this work and its publishing sequence, which began in 2009, has covered such a span of time that, by book 6, the "struggle" to publish books 1 and 2 has become part of the narrative of KOK's life. This volume opens w/ KOK living in Malmo w/ his (second) wife and their three young children, dividing the house and child-rearing chores, and KOK under great pressure to prepare the first books for release; as a courtesy, he notifies all the people from his family and his friendships who appear in the first volumes, offering to change their names and in other ways to conceal their identities - a pretty noble thing to do, and not standard practice in the U.S., w/ our constitutional guarantee of a freedom of expression, but a nice courtesy never the less. Most of his contacts have no problem w/ their portrayal, but his uncle - father's youngest brother - goes ballistic and threatens a lawsuit and pressures KOK's publisher, issuing a set of impossible demands that would quash the novel. First of all this makes us recall the portrayal of this uncle in Volume 1 - and to the best of my knowledge he was a nonentity who comes off somewhat poorly for his limited efforts to help clear up the mess left behind by his alcoholic brother, KOK's father, who died in squalor. In effect, this malevolent uncle has made himself more prominent in the novel that he would have been had he left all alone. Second, this whole episode leads us to ponder the very nature of fiction and memoir: Is the uncle a "real" person or a character in a novel? How much freedom does KOK have, and how much liberty does he take, in recalling the events of his life? the uncle's reaction occurs because he accepts this novel as a memoir, but what if it isn't a memoir? What if it's all, or mostly, fictive? What if the uncle himself is just a character, someone KOK has "made up"? Of course it doesn't feel that way to the reader - the characters and events feel entirely real to us - which of course is KOK's achievement: even the excruciating detail - what his kids eat for breakfast every morning, for example - which makes My Struggle too tedious for some readers - tends to bolster our confidence in the "reality" of this novel: who would "make up" such trivial detail, and why? It must be real.