Dalglish's men lost 1-0 to the Scottish champions at the Ibrox in a game that saw 19 Liverpool players get a run out.
Lee McCulloch's first half side gave Rangers the win and in comments quoted on Liverpool's official website after the game, Dalglish said: "It was a disappointing result and we're a lot better than that but I suppose it was in mitigating circumstances because we had people coming back who haven't played too often."
However, the match wasn't a complete washout for the Reds - allowing some returning players important time on the pitch.
"It was worthwhile in some aspects," explained Dalglish.
"We've got some boys who haven't played for a while, like Glen Johnson. He got injured before the end of last season, went with England, came back and has never really been fully fit since. For him to get an hour was important.
"For Daniel Agger to get some time after injuring his rib and the same for Fabio Aurelio - it's a useful exercise for some of the boys.
"I haven't seen much of Rangers this season so I don't know if that was them playing well or badly. For us, that was us playing badly. But that's not to take anything away from Rangers.
"I don't think there was food for thought for the Norwich game [Liverpool's next opponents in the Premier League]."
The club's reserve goalkeeper Alexander Doni impressed before being taken off due to a dislocated finger.
"He's dislocated his finger, though it's been put back in," said the Scot. "I don't know how long that takes to recover from but it was good for him, aside from the injury, because he made a couple of decent saves. It was good for him to get a game."
Finally, when quizzed about whether Rangers had enough quality to play in the Premier League, Dalglish said: "It's a one-off friendly and I don't think we'll ever see that anyway."
