The reason why Liverpool's form dropped this much should be some mental problems. Of course they faced some injuries and had many missing players as a result. Diaz was one of them and we all know how important he is for the team now. He is trying to do his best to fill Mane's place in the team. His performance so far has already been impressive.
However I don't think injury is not the main reason for this. Because they had really bad games in which they defended their opponents very poorly. Klopp needs to help the players improve their motivation. This squad are capable of doing anything they want. They just need some push.
Indeed, injuries were not the main reason for Liverpool's downturn at the start of this season, but the loss of important players in the squad greatly affected the rhythm of the game, but now Liverpool have returned to their best form, Liverpool are now sixth in the standings, I am very confident Liverpool will be able to get up and come back played well after the world cup event, because Luis Diaz had recovered from injury.
Several players who were injured were very influential in the game, especially players who contributed well or were influential to the team, and that greatly affected the team's less than optimal play.
I think Liverpool's performance comes down to a number of factors, apart from injuries at the start of the season, and Jurgen Klopp's tactics have also been read by all the opposing teams. Liverpool stick to a 4-3-3 formation, and this tactic has proven successful for Liverpool in recent years. It's just that, on the other hand, the opponent has been able to explore the weak side of Klopp's tactics.
and other factors Darwin Nunez did not live up to Klopp's expectations and only Mane could change him, or maybe there are other factors that have made Liverpool inconsistent, and recently Liverpool have started to play well, although not as optimal as last season.
The EPL is still long and it is still very possible for Liverpool to be at the top of the standings, at least Liverpool can enter the top 4 because the competition for 5 and above in the standings is getting tighter and hotter.