Most family's have arguments, fallouts, bereavements, grudges, estrangements, etc. Most also have fun and love and forgiveness.
My immediate family are lovely. I couldn't ask for better sons. My relationships with my siblings are variable, I was NC with one for decades, although various life events have healed the rift somewhat at the moment. Another sibling had a total personality change and is like a stranger, no hard feelings there, but sadly the old relationship is gone. Add in cousins, step parents, aunts uncles, etc, we have drama, fights, genetic disease, even prison sentences
I would guess that at least 80% of families get on better than the royal family does, by Harry's account, but I dont think this level of problems is that unusual either.
So this is not a vote on how unreasonable I am, it is a vote on whether your family has more or less problems in it than harry is describing in his. It is really about seeing how justified he is to feel hard done by, or whether his complaints are within the range of normal
YANBU - My family has fewer issues than Harry has described in his
YABU - my family has more issues in it than Harry has described in his