The Bees are now without a win in seven games and Hendon has called for drastic changes or else they will be out of the Underhill door in the transfer window.
"It's another disappointing one. If you concede goals like the ones we did you won't win games of football," said Hendon. "If they keep doing it they will be out. January is coming and they need to realise they can't keep making mistakes, it's killing us.
"We didn't play well but we got ourselves back in the game and we were on the front foot but schoolboy defending has cost us. The players are not taking on board what they are being told and if that carries on we will do something about it in January.
"That's the harsh reality of football. I don't want to get rid of anyone as I have a good group of lads here but if the same mistakes keep happening we'll have to make changes."