Captain Iker Casillas said there was lack of commitment, midfielder Xabi Alonso thought there wasn't enough hunger. According to Fernando Torres, Spain was "just not good enough."
Chile's 2-0 victory on Wednesday meant the 2010 World Cup champion is the first title holder to exit after just two games following the opening 5-1 loss to the Netherlands.
Spain's squad of 23 players featured 16 who were part of its World Cup success in South Africa. Casillas, Alonso and Xavi Hernandez had been the engine behind the team's triumphs on the world stage, but were left exposed in Brazil.
"We lost our knowhow, which has helped us win so many of these important games. It doesn't feel like our other tournaments."
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Spain's players agreed that they did not read their opponents well, or know when to clamp down and control the games through keeping possession as it has been known to do.
"The commitment wasn't there," said Casillas, who owned up to perhaps his two worst performances in 156 appearances for Spain. "From the very first moment everything went awry."