Neal Ardley was adamant that George Francomb should not have been sent off during the AFC Wimbledon's home loss to Southend.
Midfielder Francomb was shown a straight red card by referee Graham Scott just before half-time for a late tackle on Robert Kiernan.
Substitute Cauley Woodrow, on loan from Fulham, went on to head home John White's pin-point cross in the 76th minute for the only goal of the game.
Southend manager Phil Brown admitted he thought the sending off was very harsh and Brown's views were echoed by Ardley, who was adamant that if anyone deserved a booking in the situation then it was Kiernan.
"I have had the luxury of seeing it again and I have been in and had a chat with the ref. It was never a red card," said the Dons boss.
"When you see the sending off you'll laugh. Honestly, it was that bad. Unfortunately that is the standard we get down here sometimes.
"The linesman gave it, not the ref. He has seen some studs from his view and thought it was a dangerous tackle.
"Did the player jump off the ground? No. His studs were on the level of the pitch and he got to the ball first.
"If anything I think their player was thinking he might get booked because he landed on George's shin.
"I feel for the players. It was one moment. A great delivery and the player attacked the ball well.
"We worked hard and I'm disappointed for the fans but I'm also confident that by the time we get to 46 games we'll have more than enough points on the board."