Facebook founder Mark Zuckerberg has gone from hero to zero, almost making a list of 2012's worst chief executives.
Mr Zuckerberg fell just short of the annual list compiled by Dartmouth College business professor Sydney Finkelstein and published by Bloomberg's Businessweek.
Professor Finkelstein told Businessweek that Mr Zuckerberg almost made the list because of his "massive ego", as well as his immaturity and the consistent decline in Facebook's share price since it listed on the share market.
He made similar criticisms of Groupon's boss, Andrew Mason.
"There's no reason to believe they have the management skills to run a major public company," Professor Finkelstein said.
As for those who did make the top five worst CEOs for last year? Number one was Brian Dunn, who resigned as chief executive of Best Buy in April after allegations of an inappropriate relationship with a younger employee.
However, he was mainly nominated for a falling share price, falling sales, loss of market share and over-priced share buybacks.
Aubrey McClendon from Chesapeake Energy made the list for a series of personal transactions that appeared to involve a conflict of interest with his role as CEO.
Avon's former chief, Andrea Jung, made the list because her company's market value has plunged from $US21 billion to $US6 billion since 2004, and management rebuffed a takeover offer worth more than $US10 billion that Professor Finkelstein says looks like good value in hindsight.
Zynga's boss Mark Pincus made the list because the online and mobile gaming firm saw its share price drop 75 per cent last year.
A European boss rounds out the top five, with former Bankia chairman Rodrigo Rato facing an investigation for practices that may have led to the bank's collapse and bailout by the Spanish government.