Steve McClaren quit as manager of Championship Nottingham Forest because the club did not share his ambition.
The former England boss quit the City Ground post on Sunday after seeing the Reds beaten 3-1 at home by Birmingham in the Championship.
McClaren encountered the same problems in the transfer market that had annoyed his predecessor, plus an apparent lack of backing from the club's board left him with no option.
"I resigned - they don't share the ambition that I came for," said McClaren.
The weekend also saw owner Nigel Doughty announce his intention to step down as chairman at the end of the season.
Doughty has been at the helm for over a decade, but concedes that his decision to appoint McClaren was not one of his better calls.
"We should have been more thorough when we appointed Steve," he said. "I just felt it was a bad decision all round."