Gary Neville has described Liverpool's recent form as "woeful" and has questioned whether Jurgen Klopp will be able to turn things around at Anfield.
The defending champions slipped to eighth in the Premier League with a 1-0 loss to third-from-bottom Fulham on Sunday afternoon.
Liverpool have now lost six successive league games at home for the first time in their history, failing to score in five of those, and are winless on home soil in eight.
Klopp's men are four points behind fourth-placed Chelsea, who take on Everton in their game in hand on Monday, and face a real battle to salvage their campaign.
Manchester United legend Neville believes that the Reds' form has now gone beyond just a dip and may stretch into next season.
"How bad are Liverpool? They're really bad... When I say that, I mean really bad in sight of how good they've been," he said on the Gary Neville Podcast. "We all like different styles of football and for me, if you said put Manchester City over the last three years against Liverpool, I'm taking Liverpool all day long.
"Their speed of play, the aggression in their play, their style of play, I love it. I love the front three, I love the way the back four played, their goalkeeper is outstanding. This Man City team is a fantastic team, don't get me wrong, and it pains me to say that they are both the biggest rivals for Manchester United.
"Liverpool have been absolutely outstanding and reached unbelievable heights and I said a few weeks ago on this podcast that it was acceptable that they would have a little bit of a dip and I would go easy on them. We could never do it in the fourth year at Man Utd, there was always that dip, but this isn't a dip - this is a collapse. They're woeful at the moment in every single way.
"I don't know what it is. I'm sure there's no panic there, I'm sure Jurgen Klopp has got the experience and quality and he will know that he needs to get his team to the finish. He needs to get this season over and limp over the line, even wheelbarrow them over the line if he has to.
"When he gets them to the end of the season, he's going to have to regroup, but then you think about the fact there's a European Championships and then the season will start again pretty quickly. His players aren't going to get much of a rest."
Liverpool return to action on Wednesday evening when they face RB Leipzig in the second leg of their Champions League last-16 tie.
