Ian Sampson has blamed a breakdown in his relationship with chairman Kevin Ingram for his decision to quit as manager of Corby Town.
The 43-year-old resigned after the 5-4 home defeat by Bradford Park Avenue, only his fifth game in charge.
"I made my decision quite abruptly," Sampson told BBC Radio Northampton.
"There was a confrontation rather than a proper meeting straight after the game on Saturday where one or two things were said."
The former Northampton Town boss was appointed in May, only 24 hours after businessman Ingram took over the Blue Square Bet North club.
An almost entirely new squad was brought in over the summer, but the Steelmen have lost all five league matches so far this season.
Sampson claimed tensions with the chairman developed after last month's 4-0 home defeat by Brackley.
"We had a conversation and he thought one of the squad players was better than five of the players I had in the team," the Yorkshireman added.
"I didn't agree but we got on with it and got ready for the next game."
The further difference of opinion following the Bradford game convinced Sampson the relationship was not going in the right direction.
Despite his decision to leave, Sampson insisted he had no regrets about taking the job.
He continued: "I didn't have any intentions of resigning because I'd lined two players up to come in for next week's game at Workington.
"(But) the relationship with [Northampton chairman] David Cardoza was a lot better than it was with Kevin and I could only see it getting worse."
Chris Plummer is now in charge at Corby in a caretaker capacity.