I agree wholeheartedly. It's oddly unmoving and odder yet, for a memoir about not just one divorce, but two... it's BORING... and therefore hard to get through. I think it has something to do with the style of her writing-- she tells us what she does and why -- all roads lead back to being a child of divorce-- but she doesn't go deep and let us see her real struggles to figure it all out. It's true that not a lot happens and she comes across as unsympathetic and quite surface. In other words, she gives kids of divorce a bad name.
I think one of the most disappointing aspects for me is that her marriage is oddly not all that interesting or unique but somehow we get to a divorce. We go from marriage to babies to apartment purchase to kitchen renovation to home purchase to divorce... without any true sense of how the divorce came to pass. I think she would have been better served to have written the memoir in present tense so that we can be on the journey with her and she should have left the comparisons and analysis to the readers.