Aldridge, writing in his Liverpool Echo column, targeted Moses for particular criticism after Brendan Rodgers admitted his reserve side had let him down in struggling to a win over League One minnows Oldham Athletic in the FA Cup on Sunday.
Moses has scored just once for the Reds since sealing a season-long loan move in the summer and has provided no assists either.
Former Anfield favourite Aldridge said, "Not many players get the chance to go out on loan to a bigger club but I don’t think he realises how lucky he is.
"He looked completely disinterested in that opening 45 minutes and gave the manager little option.
"There was no desire, no spirit. Maybe he’s lacking a bit of confidence or maybe he’s just unhappy because he’s played so little recently.
"But he certainly doesn’t look like he’s in the right frame of mind."
There have been some suggestions that Moses, who hails from London, may be homesick as he contends with the move to the north west; but the former Crystal Palace man will find his path to the first-team at Chelsea equally as blocked as his current predicament at Anfield.
Aldridge, though, believes Sunday's performance epitomises just why he currently finds himself among the substitutes rather than out on the pitch.
"He can’t complain about not being in the team after that performance," he claimed. "You have to command a place and he failed to stake any type of claim.
"When Moses arrived I thought he would be a decent acquisition. He did very well for Wigan and did okay during his first year at Chelsea.
"He talked about wanting to nail down a place at Anfield but to achieve that you need to deliver on the pitch and he hasn’t done that. He has let himself down."
Aldridge also used Oussama Assaidi's productive loan spell at Stoke City as further evidence that drafting Moses in was a mistake, and even proposed the idea of cutting his spell at the club short after his insipid displays.
"Hindsight is a great thing but we would have been better off keeping Oussama Assaidi and not signing Moses," the Irishman continued. "Assaidi has contributed a lot more for Stoke during his loan spell than Moses has for us.
"I don’t know whether Chelsea would agree to take him back as they’ve got a big squad but it might be in everyone’s best interests if the loan is cancelled."
image: © Vincent Teeuwen