Mark Warburton made his frustration clear after QPR squandered a lead at West Brom.
They were ahead through Andre Gray’s early goal until a mistake by Seny Dieng gifted the home side an equaliser with 15 minutes remaining.
Keeper Dieng stopped Karlam Grant’s shot without managing to hold the ball – and when reaching to gather it he nudged it into his own net.
And Ilias Chair giving the ball away led to Grant scoring a late winner.
Rangers boss Warburton said: “I’m more than frustrated and the players know that. They’re a really good group but we let ourselves down.”
Worryingly for Warburton, who has consistently warned that the packed fixture schedule would result in injuries, Stefan Johansen limped off with what looked like a hamstring problem.
Jordy de Wijs also went off on a hugely disappointing night for the R’s, who are already without with the injured Lee Wallace and Sam McCallum.
“Stef we’ll have to assess in the morning and the same with Jordy,” Warburton said.
“We’re placing such a demand on players and they will break. You’re asking athletes to deal with demands their bodies can’t take.
“We played two away games in a few days and lost Lee Wallace. Sam McCallum – as fit as you like, played 41 games for Coventry last season – out with a hamstring injury.
“You look at all the injuries in the league. It’s walking wounded all the time. There has to be at least a debate about what we’re going to do here.”