Martin Field admitted he had lost focus after standing down as manager of Eynesbury Rovers.
The promotion-winning chief called time on his Hall Road reign last week.
He spent three seasons working alongside current chairman Matt Plumb as joint-boss before taking sole charge ahead of the current campaign.
Field said: “To be totally honest I wasn’t giving the job the commitment it needed. I lost my father during the summer and I don’t mind admitting it hit me very hard.
“I have a very close family and I also spend a lot of time working away. I haven’t been able to focus enough on football and it was not fair on Matt, who does so much for the club, that I wasn’t giving 100 per cent.
“I’ve been poor at my job and I’m not going to pretend any differently. That’s why I took the decision to step down.
“It is a shame I couldn’t finish the job I wanted to do at Eynesbury. Winning promotion and getting the club back into the Premier Division was important, but I wanted to kick on again this season which hasn’t happened.
“I wish the club all the best for the future and hopefully Matt can bring in the right man to take them forward. I’m sure I’ll be back in football once I’ve had a bit of time away.”
Field admitted the timing of his exit could have been better. He ended his reign a couple of hours before Rovers hosted Newport Pagnell last Tuesday night. They went on to lose that game 3-0 with coach Paul Reynolds and Under 21 boss Dave Northfield in charge.
Reynolds has also since departed in the wake of a surprise 2-0 triumph at unbeaten leaders Leicester Nirvana last Saturday.
Field added: “I have apologised to Matt about the timing of my departure as that was a bit out of order on the day of a game.
“But I’m the sort of guy who gets a bee in his bonnet and does things. I had been up since 3am as I was working in Brighton, I had a row with a player and I wasn’t in a great frame of mind.
“I’m disappointed to have left, but these things happen in football.”
Chairman Plumb has already identified the man he wants to replace Field.
He has already spoken to his un-named target and says an appointment could be made sooner rather than later.
Plumb said: “I’ve got someone in mind and hopefully something will happen in the coming days.
“There is no need to rush though as it is all about making the right appointment for the club.
“I’ve received a couple of calls from people expressing their interest in the job, but they are not something I have chosen to follow up as I prefer to approach the person I want to bring in.”
Caretaker Northfield won’t be considered for the job despite masterminding Rovers’ win at Leicester Nirvana.
Plumb added: “Dave already runs the Biggleswade Under 18 side in addition to our Under 21 team.
“The job has come up at the wrong time for him really. We have a good pool of young talent and don’t want to disturb that by moving the manager into the first-team role.”
Rovers go to Northampton Spencer tomorrow in the Premier Division and then have a Hinchingbrooke Cup tie at Stotfold on Tuesday.