I don't know him personally but I cannot describe him admirable based of his acquisition of property in Hawaii. He bought 700 acres of land but his property surrounds holdings owned by original Hawaiian land owners. He put a big fence around his property which also prevents these owners from being able to access their traditional farms.
Starting last month, Zuckerberg began filing lawsuits against Hawaiian land owners who own small slices of his estate that were passed down from generation to generation... descendants of Kuleana tenant farmers that were granted parts of the land between 1850 and 1855. Based on Hawaiian law, descendants of those farmers — or descendants of any Hawaiian resident that later purchased land from those farmers — remain the rightful owner, regardless of the existence of a property deed or will.
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Imagine that your family owned a plot of land for generations and a neighbour bought all there properties around your land to encircle it. Then put a fence around everything so you could access this property. Even if he gives a "fair" value for the property (millions of dollars) it isn't something that I would call admirable.
I really didn't know anything about it and I really agree with you that land is bad because some of it is an inheritance and its owners don't want to sell it.
Greetings friend