Tony Mowbray was unhappy that Middlesbrough were denied three points against Derby at The Riverside where he claims the visitors' late equaliser was offside.
Paul Coutts levelled matters for the Rams in the 88th minute but Mowbray believes a Derby player had been offside in the build-up to the goal.
Lucas Jutkiewicz netted twice for the hosts, scoring his side's second goal nine minutes from time to put Middlesbrough 2-1 ahead - only for Coutts to snatch a point for Derby.
The Boro boss said: "When you get yourself in front late on the expectation is that you'll take all three points.
"The frustration is that the goal was offside but we sit here at 2-2 and can't change it now because the officials got it wrong.
"It's frustrating when they do but you'd have to say on the balance of play that Derby deserved to take something from the game. Derby showed they're a decent team, they've got some nice tidy footballers.
"We have to find a way of winning football matches. The first three matches were very, very tight, all decided by the odd goal.
"I think there was evidence tonight that we lacked a bit of creative spark, somebody to beat people and drive past people but the reality is that those type of players are not available to us at the moment.
"If the officials had done their jobs properly you'd have to say that we'd have won 2-1, but that's football. That's the fine margins of football and we have to live by them."
The attendance of just 13,337 represented the lowest-ever turnout for a league game at the Riverside, with Mowbray adding: "The crowd has been low all season.
"It's disappointing to look up and see the empty seats. Is it the lack of entertainment, is it financial? I'm not sure.
"We've got to look deep into the reasons as to why the fans aren't coming."