The 38-16 loss at Apia Park, Samoa's fourth successive test defeat, reduced them to 16th in the world rankings, their lowest position since the index was introduced in 2003.
Head coach Alama Ieremia said everyone was hurting and he accepted that all results, good or bad, ultimately came back to him.
"I'm the head coach so I take full responsibility for anything that happens in the campaign so I've got no issues with that," he said.