Messi was speaking with Mingo in Argentina.
"I made a change to start from zero. A lot had gone on, things had happened, and I said to myself: 'I have to break this and start again'," Barcelona's No.10 said.
Messi also spoke about the loss in Copa America final, which led to him announcing his international retirement at the time.
"It was how I felt in that moment. Everything came crashing down. I felt like that [final] was the one, given how the team was and how we'd played in the competition. It was a huge disappointment."