For England, their best showing was that one match in which they didn't lose. The rest of their scorecards were abysmal.
So, it was quite dismal but I didn't realize that this was their worst performance against Australia in over a 100 years!
19.18 England's batting average in this series, the lowest for any team in a five-match Test series since 2001. It is also England's worst batting average in an Ashes series since 1890, where they averaged 15.74 across the two matches.
The big guns -- Root, Stokes, and Buttler -- couldn't make any impact.