Torquay United manager Chris Hargreaves says captain Luke Young's sending off was a "moment of madness".
Young was dismissed in the 12th minute after reacting to a foul by Scott Kay, the first time the midfielder has been sent off in his career.
"It was a moment of madness from our captain. Five years ago, never mind 10 years ago, it would have been a talking to and not even a booking.
"But in today's game you can't do it," Hargreaves told BBC Radio Devon.
"He's got to learn from that as it's a big error of judgement."
Despite being down to 10 men for much of the game the Gulls, who have won just once in their last nine games, dominated for long periods, before going down 2-1 to a late goal.
"The lads were magnificent for 80 minutes, got back into it, scored a good goal, but then just turned off at a vital time," said Hargreaves.
"We were dominant and played ever so well, and with 10 men we looked like the team that were going to score, and we did.
"I can't fault the lads, there's so much effort gone into that performance it's just a sickener that you don't get that point, or the three points that you deserve.
"Their manager was almost embarrassed by his 11 men against us, but that's no good as he's got the win."