Karl Robinson threatened to wield the axe after 10-man MK Dons went down to a Mathias Pogba double in a 2-1 defeat at Crewe.
The Dons boss was fuming as Pogba cancelled out Patrick Bamford's opener then struck the winner before Anthony Kay picked up two yellow cards. Robinson said: "That was a shambles. We were the best team for the first half-hour but the final half-hour was totally unacceptable and I apologise to the fans."
He added: "I will be here next season but if they keep playing like that then some of those players won't be. We have some good young players at this club and I will start playing them instead - it might mean more to them. We should have had a penalty for a blatant handball and there first goal comes from a free-kick that was given but nobody knows what for.
"We are struggling because we only had four people on the bench and three people playing who could only manage an hour and it's hard but our mentality should be stronger when the fatigue kicks in. I can't defend Anthony Kay. It was two blatant yellow cards and he has let everyone at the club down."
Crewe could have taken an early when Kelvin Mellor played in Ryan Colclough but the young winger shot straight at keeper Ian McLoughlin. But it was the visitors who went in front with 31 minutes gone when former Crewe striker Ryan Lowe crossed for Patrick Bamford to power home a superb header.
Dean Bowditch saw a shot saved by Alex keeper Steve Phillips, Darren Potter's rebound hit Mark Ellis and Ryan Lowe blazed over at the third attempt. Ellis thought he had headed the Alex level only for Bowditch to clear off the line and Ellington forced McLoughlin into a fingertip save with a fierce 30-yard effort.
But Crewe equalised five minutes before the break when Pogba nodded in Gregor Robertson's cross at the far post. And Pogba had the last word, burying the winner at the second attempt after McLoughlin saved his initial shot with six minutes to go before Kay got his marching orders.
Alex boss Steve Davis said: "Never write this lot off - we could still make the play-offs. We haven't been consistent enough at times this season but if we keep playing to the level we have in the last two games then who knows what can happen.
"The pitch was testing but there was some good quality. We rode our luck when they hit the bar but we dug in and it was a hard-earned win. We are showing grit and determination now and a great belief that we are never beaten and while we have the belief we always have a chance.
"Pogba was frustrating in the first half but he got us back in the game and took his second well and I'm pleased for him."