And he also believes he deserves credit for lowering the average age of the squad since replacing David Moyes as boss in 2013.
Martinez said: “I always have a very clear and constant communication with the board, but the focus now is to try to regroup, to try to get through this pain.
“When I took over as manager, there was a squad with an average age of 30. Now the average age is 26.
“I haven’t been able to sign players with a blank cheque. I think it’s quite clear to everyone that we had to manage our assets well, and we had to sell players.
“It’s time for scrutiny, I accept that.”