'Die Mannschaft' were stunned in Russia, failing to progress through the group stages after losing 2-0 to South Korea.
"This time we missed a little bit with our emotions, our fire - some players were not at their top level," Low told the 'BBC'.
"It was a shock. We have to learn from that and accept that".
Low and his assistant, Oliver Bierhoff, blamed their side's defeat to overconfidence, however they believe that the players have refound their motivation.
"We are re-motivated," Low said. "We were four years at the top level, we won the World Cup in 2014 and the Confederations Cup in 2017. If you want to win the World Cup again, everything has to be perfect.
"We have to accept our results but we're looking forward. We know we have a good team of motivated players. We will come back again.
"It's always a challenge in Germany, everyone expects you to win a tournament. But we had a very good last 10 or 12 years. This time it was bad but we are sure we will be better in the future.
"[German FA director] Oliver Bierhoff and I met immediately after the World Cup. For 14 years we were responsible about the team and for the organisation in this federation.
"We felt a lot of motivation, power and strength to continue our work."
He again defended his decision to leave Manchester City winger Leroy Sane out of the squad.
"It was a decision at the time but I know Sane has a very good future. He has a very good speed. But he has to grow. He was last year very good but I took another decision.
"But now he came back again with a lot of motivation. I hope he will perform in the next months and years for Germany. He's 22 - Lionel Messi and Cristiano Ronaldo had their best time about 26 to 29."
Germany will host the 2024 European Championships, beating rivals Turkey.