Ivorian striker Armand Gnanduillet and Jack Lester finally broke Wimbledon's resistance in the second half to leave the visitors at the bottom of League Two.
"I felt at half time we were an accident waiting to happen," he said. "We made substitutions to get a little bit more of a stranglehold on the game but one of them has cost us the game.
"People are not winning their individual battles, they're two yards off the pace and they're not sticking to the game plan we set out.
"We are in a relegation fight and the fans deserve more than that. There's not enough passion, not enough steel, not enough work rate, all the things we talked about.
"I am not taking anything from this. At the moment I am seething and I am hurting and I hope the players feel the same way."