The latest bruising night at Anfield means Arne Slot's side have lost their last three games by at least three goals, following after 3-0 losses to Manchester City and Nottingham Forest in the Premier League.
The reigning Premier League champions have now lost nine of their last 12 matches across all competitions.
Jones, 24, bravely faced the media after the PSV Eindhoven defeat and did not spare his words when assessing the performance and the club's current run of form.
Speaking to Irish broadcaster RTE, he said. “I don’t have the answers. Honestly, I don’t. I’m saying that to everybody. It’s just unacceptable.
"I don’t even have to wait to think about it. I’m past being angry inside. I’m at the point now where I just don’t have the words.
“It’s hard because I’m playing for the team I support. I’m a fan, and I’ve seen this club all my life.
“In a long, long time, I haven’t experienced a Liverpool team going through a period like this with results like these.
“But at the end of the day, we still have that badge on our chest. And until that badge is gone, we’re always going to fight.
“We’re going to try and get this team back to where it needs to be, show everyone again what this club is about and why people call it the best team in the world.
“But right now, we’re in the s*** and it needs to change.”
Jones doubled down in a separate interview with CBS, suggesting Liverpool have become “too nice", and too far away from last season's side that relentlessly pressed opponents and put bodies on the line to protect their goal as they marched to the Premier League title.
The England international said: "You just want to be a man out there and you just want to tackle someone and just be a dog out there.
“It’s got to be on me and the rest of the lads to change this around to not be so nice where teams are coming here thinking, ‘We’re gonna win here and score two, three, four goals’.
“This used to be a place that you hated to come – with the fans and how we’re going to play and how we’re going to press and be absolute dogs.
“Now we hardly even play. There’s times where we do play but off the ball stuff… I think that is the stuff that has to change.”
The club’s alarming decline heaps pressure on manager Slot, just six months removed from winning the Premier League title, who oversaw a £426 million summer spending spree that brought in forwards Alexander Isak and Hugo Ekitike and midfielder Florian Wirtz.
