Goals from Ivan Toney and Josh Dasilva inflicted another damaging loss on Moyes.
Goals from Ivan Toney and Josh Dasilva inflicted another damaging loss on Moyes, whose side have now lost five consecutive Premier League matches.
Moyes last week insisted the Hammers were not in a relegation scrap but they face the very real prospect of being in the bottom three on New Year’s Day.
Incredibly, the Scot said: “We played really well tonight,” before the subject of a relegation battle was raised.
“I’m hoping it’s not the case,” he added. “But we’ve lost a few at home recently so we have to be aware that we have to pick up points.
“I don’t think it’s unfair. In the business we’re in if you don’t win in five games you’re going to be under pressure.
“I only want the best for West Ham, it’s been a great club for me and we’ve done well. I’m determined to keep it there and not get dragged down. I hope we can get away from where we are.”
It could have been a very different evening had Declan Rice opened the scoring in the fifth minute but his 20-yard curler hit the post.
Instead, Brentford went ahead when Christian Norgaard’s volley was saved by Lukasz Fabianski and Toney snaffled the rebound for his 13th goal of the season.
They doubled their lead when Toney flicked on a throw-in for Dasilva to chase.
The midfielder raced past Aaron Cresswell, who had a three-yard head start, before burying his shot past Fabianski.
Yet Moyes, who spent £160million on a host of misfiring new signings like Lukas Paqueta and Gianluca Scamacca last summer, said: “I only have praise for the players tonight. nothing else.
“Their effort, commitment, how they went about their job, how they kept going at 2-0 down. For me, it is only praise.
“Of course, we know where we are failing, in the final third and we have just started to lose a bit defensively.”
West Ham fans are optimisically calling for former Chelsea boss Thomas Tuchel to replace Moyes, but a move for manager who won the Champions League just last year seems wildly optimistic.
Former Spurs boss Mauricio Pochettino and ex-Burnley manager Sean Dyche have also been linked with a move to West Ham.