TVNZ news and current affairs boss Ross Dagan is leaving the state broadcaster amid growing pressure to make more profits and the launch of his new 7pm show Seven Sharp.
Bill Ralston, a previous head of news and current affairs at the broadcaster, said Dagan killed off Seven Sharp's predecessor Close Up and created the new show under threat of current affairs losing the 7pm timeslot.
TVNZ journalists were surprised at the sudden resignation of Dagan, hired just 10 months ago to shake up the newsroom.
"Ross was a good guy, and anybody who talked to Ross knew he was not a happy camper there," said Ralston.
Ralston said Dagan had worked in commercial TV but he doubted Dagan was "experienced working in an environment like the shark-infested waters at TVNZ".