Wigan were 3-0 down at half time and Kirkland was at serious fault for Blackpool’s fourth.
“To a man we let the fans down,” said Kirkland.
“They are entitled to say what they want. That is part of football. The way we played in the first half, we deserved it.
“Now everyone has to stand up because we are going to take a lot of criticism, and rightly so. We weren’t good enough.”