The author is pretty wordy. But I don't find a genuine hard hitting line of criticism against Sheryl Sandberg. It mostly goes on as loosely connected ramblings - about her writing a B-school type book, to being pals with Goldman Sachs & then the charity. The ending about justifying having children as best source of happiness is bizarre. Happiness is a very subjective experience. Some find it in religion as well. Maybe building new things or pursuing certain hobbies too (mountaineering for e.g.)

Apart from this story, I do generally find her several of her actions as COO quite questionable - especially Cambridge Analytica & the weird data/privacy policies over the years. As the boss, she did approve of all these moves.

I don't/didn't ever work for Meta, but I am told by senior tech folks working there that MZ is generally liked/respected within the engineering cadres for his leadership (as opposed to the zombie/alien jokes floating around). But Sandberg was someone you wanted to keep yourself away from, at all costs.