Complex sentence: The only single taken from the album was the opening number "This Wreckage"; though it failed to chart higher than number 20 and the composer admitted that regardless of its merits as a song it was a "bloody stupid single".
Split into simpler sentences: The only single taken from the album post release was the opening number "This Wreckage"; which charted no higher than number 20. The composer admitted that regardless of its merits as a song it was a "bloody stupid single".