Plymouth manager Paul Sturrock has blasted the 'stupidity' of Simon Walton, while Barnsley boss Simon Davey felt his side deserved their 2-0 victory at Oakwell.
Anderson De Silva's deflected 38th-minute header - later claimed by team-mate Jon Macken - and Jamal Campbell-Ryce's last-minute penalty clinched the three points and ended Barnsley's five-game run without a Championship victory.
Plymouth had been reduced to 10 men after just 28 minutes when young midfielder Walton kicked out at De Silva and Sturrock felt that the 21-year-old let his team-mates down.
Sturrock said: "You can train football teams, you can shape football teams, you can put them out and give them a gameplan.
"But when somebody does what he did today, all of a sudden the gameplan goes out the window. I'm proud of my players to be fair. Second half we came out and gave it a go.
"It's hard enough winning football matches in this league with 11 men without having to play with 10, but to be fair they responded in the right way.
"We're a hard-working team with a good work ethic, but they weren't given the opportunity today because of someone's stupidity.
"I don't think Walts is in the right frame of mind (to apologise). He did the right thing and kept very, very quiet.
"Him and I are having a conversation on Monday morning about the whole scenario."
Davey wore the smile of a manager whose side had just ended a damaging winless run, but he conceded the Tykes had made hard work of it.
"We deserved it," he said. "We could have finished the game 10 times over, I think Anderson could have had double figures today.
"He didn't even get the goal he thought he had, it hit Jon Macken's head, so that's Jon Macken's goal."