The Reds have endured a disappointing defence of their Premier League title and the full-back believes that the team have mistakenly expected to win games as a result of their efforts in recent campaigns.
Alexander-Arnold told Liverpool's matchday programme: "The trap we have probably fallen into this season is that we've almost expected to win games on some occasions because we know we have the quality to find that goal from somewhere.
"That happened naturally last season and the season before. But, breaking it down, it didn't just happen because we were lucky - it happened because we were still working hard, we were doing the basics and the fundamentals right until the very last minute and that really worked in our favour.
"The fact that we were still doing those things meant that we would still create the right opportunities and we wouldn't be forcing passes, but we'd still stick to our way and would create something we could score from.
"I think this season we've maybe forgotten a few of those fundamentals and we've kind of just expected to do that because it became so natural for us."
Alexander-Arnold has faced questions about his performances this season for the first time in his Anfield career but accepts those who have criticised him.
He said: "This has been something of a spell of bad form that I haven't really had before. It's always been quite good in the past, so this is new.
"But I set targets and levels and have expectations of myself. If I don't meet them then I'm not happy and when I do meet them, then I am."