Chelsea should have won that much from their opponents, I'm not really familiar with Barrow club. But indeed, with Chelsea's inconsistent condition, we really can't expect too much. It's just that in the EFL Cup this time, the result was really satisfying, with 5 goals. and among them, Christopher Nkunku did a hat trick.
Chelsea will use matches like this to build confidence for the premier league, Chelsea also has small clubs to play in the conference league therefore we should be expecting scoreline like this when they play those small clubs. When we can begin taking Chelsea serious is when they're consistent with this scoreline not just in the small tournaments but in the premier league and when they can hold other big clubs to draw instead of losing to them always when they play. I didn't watch this game as i can't waste my time watching a match I know Chelsea will win, I don't even like watching Chelsea games like that as I know they're not consistent in how they play.
It was due to their discipline and good teamwork on their secondary squad. They were able to create very structured gameplay like the picture below.
From the picture above, you can see how their secondary squad is progressing a lot. They're much more structured, and they're creating so many threatful pass against Barrow.