The former Anfield star believes the fringe players at the club aren't good enough.
Hopes had been high after they took an early lead through Adam Lallana, with many expecting them to go on and win comfortably. Instead, another poor piece of defending saw them concede an equaliser, with a second never looking likely to come.
It was another hugely frustrating performance from Brendan Rodgers’ side, and McManaman was one of many critics at the final whistle.
“I thought it was a poor performance; Liverpool should be demolishing teams like this,” he told BT Sport.
“This should be 3, 4 or 5 nil and everyone goes home happy. The only positive from tonight’s game is that the other game [in the group] was a draw as well.”
Liverpool fringe players not good enough
Rodgers again went with something of a second string side in the Europa League this season, having done so for the trip to Bordeaux on matchday one.
His XI wasn't completely made up of reserves, though, with the likes of Jordon Ibe, Danny Ings, Emre Can and Simon Mignolet having featured regularly for the first-team this season.
The fringe side once again failed to impress against opposition they would be expected to beat, though, and McManaman says their failings highlight the lack of depth in the Anfield ranks at present.
“It shows that the fringe players aren’t good enough,” he added.
“That might start to affect confidence. The crowd weren’t happy at the end of the game.”