Manager Karl Robinson said he felt "sick" after MK Dons' 1-0 defeat by Port Vale in League One on Sunday.
Alex Jones scored from a penalty rebound, after Dean Lewington handled.
"Port Vale got outplayed, dominated. It was a silly penalty that was saved and drops back to them," said Robinson.
"You're judging people on a fraction of a game. Take Lewington's error and the save (out) we would have won today because Vale would have had to come out and do something more."
He continued to BBC Three Counties Radio: "I feel for the players. They are trying their best, and I get the frustration of the fans, but arguably the players could not have done any more.
"The players are obviously good enough for this level because they are dominating games."
The defeat against fourth-placed Vale meant Robinson's side are still without a win at home since March's 2-0 win over QPR in the Championship.
The Dons had 19 shots on Sunday at Stadium: MK compared to Vale's seven, and Robinson bemoaned his side's luck.
"I understand that results are the main thing, I'm not stupid enough not to know that," the 36-year-old added. "But the other 100 things below, what's constituting to that result, are very fine margins.
"We could be sat here third or fourth in the league very comfortably and not play any different. In years gone by we would have maybe nicked that 1-0 and people would have gone 'wow, it's wonderful'."